bheinen74 Posted November 19, 2008 Share Posted November 19, 2008 Why do people prefer oiling the bottom of a car vs undercoating? I prefer undercoatiing/por 15, as it drys. Once its dry, i can drive gravel roads and the underbody stays clean, no dirt getting trapped in places that need to drain water out. what about oiling, doesnt that cause sand, dirt, dust to gather, therefore, holding salts and stuff from the road, vs falling off. Link to comment Share on other sites More sharing options...
cobcob Posted November 19, 2008 Share Posted November 19, 2008 Problem that I have on mine is that the 26yo factory rubberized undercoating gets cracked, traps dirt & water and then the floor rots... :-( POR15 is probably a good way to go... I know I've got a LOT of R&R to do to mine pretty soon... Might gut the interior this weekend and try to get my hands on some 20 gauge sheet metal to start welding in patch panels. Link to comment Share on other sites More sharing options...
ettev Posted November 19, 2008 Share Posted November 19, 2008 Why do people prefer oiling the bottom of a car vs undercoating?I prefer undercoatiing/por 15, as it drys. Once its dry, i can drive gravel roads and the underbody stays clean, no dirt getting trapped in places that need to drain water out. what about oiling, doesnt that cause sand, dirt, dust to gather, therefore, holding salts and stuff from the road, vs falling off. I had the same questions. Oiling doesn't make sense to me. How is it done? Do you guys use motor oil in a garden sprayer and blow it all over the belly of the beast? What kind of oil do you use? If I'm going to go thru the trouble of spraying something on the underside it's going to be something that doesn't wash off. Link to comment Share on other sites More sharing options...
zyewdall Posted November 19, 2008 Share Posted November 19, 2008 Ummm -- don't most EA82's oil the underbody by by leaking out of the cam and rear seals and blowing back over the bottom of the car while you drive? Link to comment Share on other sites More sharing options...
ettev Posted November 19, 2008 Share Posted November 19, 2008 Ummm -- don't most EA82's oil the underbody by by leaking out of the cam and rear seals and blowing back over the bottom of the car while you drive? Well done! Link to comment Share on other sites More sharing options...
idosubaru Posted November 19, 2008 Share Posted November 19, 2008 oiling with used motor oil is free. POR15 and undercoating is not. and time. a quick oiling is easier. a proper undercoating needs to be done well. it's not hard to miss one spot, trap in some water, leave some rust, or areas exposed. i dont know that very many people do either though, so that's probably another reason you just don't hear much about it really. "oiling" has been around for a long time, for decades. that probably accounts for some of the visibility. is oiling any different than just dumping used oil in a field over the long run? pretty sure it's about the same thing. Link to comment Share on other sites More sharing options...
TeamCF Posted November 19, 2008 Share Posted November 19, 2008 My grandfather on my dad's side used to dump some of the old oil after an oil change all over the engine compartment of his old Chevy truck. Sounds odd. But we had all lived in MI at the time (salt) and years later when we had gotten the truck from him I realized why. A quick washing with some solvent revealed an engine that looked like new and was easy to work on with no rusted fasteners. He was planning ahead. Though these days. Dumping your old oil all over you vehicles mechanicals and then washing it off in your drivway when it's time to work on it..... Not quite the EPA's first choice on what you should do. My EA81 has developed the perfect balance. It leaks out just enough to keep everything coated on the engine. But it has never left a drop in the driveway. Link to comment Share on other sites More sharing options...
bratman18 Posted November 19, 2008 Share Posted November 19, 2008 Yeah the undercoating eventually cracks or the surface that it is sprayed on...whether from the factory or yourself...wasn't prepared properly and what you can't see is that there are pockets under the undercoating which with age allows water and dirt to find a way into those areas! When this happens it rusts terribly! My Brat has been oiled on every seam, crack, crevace, hole, and then some every year at least once a year for the last 10 years and I strongly believe that that is why I have one of the very, very, very few old subarus that aren't completely rusted out in Maine! I use NAPA brand chain and cable lube. It spreads out and into the metal and repels moisture! Link to comment Share on other sites More sharing options...
SoobieDoo Posted November 20, 2008 Share Posted November 20, 2008 Oil will be easy and cheap, but needs to be applied regularly, as it will wear off. If you committed to doing that, say with every oil change, that's fine. But...if you know that you won't do that, spend the time and money to undercoat it. That means stripping off all of the factory junk and coating everything really well. I'd still call the rubberized stuff regular maintenance, but you won't have to deal with it once a year. I've heard POR15 is good stuff, but $$$. Link to comment Share on other sites More sharing options...
bratman18 Posted November 20, 2008 Share Posted November 20, 2008 (edited) The oil doesn't wear off fast at all! I only apply twice a year and there is still lots of evidence that oil was applied! Like I said before..it soaks into the metal and spreads! But you have to do like I said and put into all holes and cracks and what not! Edited November 20, 2008 by bratman18 Link to comment Share on other sites More sharing options...
SoobieDoo Posted November 20, 2008 Share Posted November 20, 2008 The oil doesn't wear off fast at all! I only apply twice a year and there is still lots of evidence that oil was applied! Like I said before..it soaks into the metal and spreads! But you have to do like I said and put into all holes and cracks and what not! Just saying fast compared to a good app. of undercoating. Some people are not very good at regular maintenance, and twice a year may never get done. It does now need to be redone, but the factory undercoating on my car is over 20 years old. I'll be oiling my car! Link to comment Share on other sites More sharing options...
bratman18 Posted November 20, 2008 Share Posted November 20, 2008 Just saying fast compared to a good app. of undercoating. Some people are not very good at regular maintenance, and twice a year may never get done. It does now need to be redone, but the factory undercoating on my car is over 20 years old. I'll be oiling my car! Right yeah I know what your saying, but Jeez we are talking about old subarus here I personally will do a lot to keep mine from rusting away! I would hope that others out there would be willing to do some "maintenance" But anyways yeah my undercoating is falling off as well and a lot of has been torn off from dragging its belly through the trails! Link to comment Share on other sites More sharing options...
SoobieDoo Posted November 20, 2008 Share Posted November 20, 2008 Right yeah I know what your saying, but Jeez we are talking about old subarus here I personally will do a lot to keep mine from rusting away! I would hope that others out there would be willing to do some "maintenance" But anyways yeah my undercoating is falling off as well and a lot of has been torn off from dragging its belly through the trails! They use salt there in maine? I believe WA uses de-icer, but I'm right on a bay also. Still, the rust isn't too bad...yet. Ever used Ospho, or some other phosphoric acid? It's supposed to be painted over, but I've used it on a regular basis to stop rust. Maybe a good app. of that before oiling!?! Link to comment Share on other sites More sharing options...
bratman18 Posted November 20, 2008 Share Posted November 20, 2008 They use salt there in maine? I believe WA uses de-icer, but I'm right on a bay also. Still, the rust isn't too bad...yet. Ever used Ospho, or some other phosphoric acid? It's supposed to be painted over, but I've used it on a regular basis to stop rust. Maybe a good app. of that before oiling!?! Yeah Maine uses salt and this wonderful:dead:creation called calcium chloride! It rusts everything! I have seen several cars that are newer than 2002 that are just falling apart! Yes I have used ospho before and it seems to work well, but when you start with a car that has rust, and without completely tearing the car into pieces, you can't get to all the rust than it still doesn't help! The only way that I have found in this circumstance is to use oil. But like I said I primarily use chain and cable lube because of the way it soaks in and spreads! My dream is to get a rust free subaru from out west so that I can start a little more "fresh." I could care less about the running gear I just want a shell!!!! I'm sure that ospho would work well in the way you said if you were starting with something that wasn't too rusty to start with! Link to comment Share on other sites More sharing options...
SoobieDoo Posted November 20, 2008 Share Posted November 20, 2008 Yeah Maine uses salt and this wonderful:dead:creation called calcium chloride! It rusts everything! I have seen several cars that are newer than 2002 that are just falling apart! Yes I have used ospho before and it seems to work well, but when you start with a car that has rust, and without completely tearing the car into pieces, you can't get to all the rust than it still doesn't help! The only way that I have found in this circumstance is to use oil. But like I said I primarily use chain and cable lube because of the way it soaks in and spreads! My dream is to get a rust free subaru from out west so that I can start a little more "fresh." I could care less about the running gear I just want a shell!!!! I'm sure that ospho would work well in the way you said if you were starting with something that wasn't too rusty to start with! Yeah, I'd say our rust probs here are only better due to the de-icer...but still not good. Maybe you can find a soob from oklahoma or someplace! Ospho wouldn't work at all on a car previously oiled too. Think that i'll scrape off all loose undercoat, double coat of ospho, then oil. I might try some stuff called Kroil. It's supposed to be very good and is advertised as "the oil that creeps!" Link to comment Share on other sites More sharing options...
ettev Posted November 20, 2008 Share Posted November 20, 2008 (edited) Yeah Maine uses salt and this wonderful:dead:creation called calcium chloride! It rusts everything! I have seen several cars that are newer than 2002 that are just falling apart! Same here in Pennsylvania. This new stuff is not only killing vehicles but its also rotting out our reinforced concrete roadways and bridges. My inspection mechanic tells me that it literally is rotting cars away from the belly upward and our state highway department has undertaken more "emergency road and bridge repairs" than I ever remember prior to them using this crap. Edited November 20, 2008 by ettev Link to comment Share on other sites More sharing options...
subiemech85 Posted November 20, 2008 Share Posted November 20, 2008 just did some googling and found waxoyl http://www.robisonservice.com/articles/RonR_waxoyl.asp http://www.cumminsforum.com/forum/auto-body/49819-rustproofing.html Link to comment Share on other sites More sharing options...
bratman18 Posted November 20, 2008 Share Posted November 20, 2008 Same here in Pennsylvania. This new stuff is not only killing vehicles but its also rotting out our reinforced concrete roadways and bridges. My inspection mechanic tells me that it literally is rotting cars away from the belly upward and our state highway department has undertaken more "emergency road and bridge repairs" than I ever remember prior to them using this crap. Yeah I don't understand it, I'd much rather just have sand on the roads! The MDOT is pretty much saying that there is no negative effects of the use of calcium chloride! I see the same effects here with the concrete just falling apart and the trees on the side of the road turning brown and dieing! But iof you oil your cars and wash often in the winter it helps a lot! And I highly suggest that with you ettev because of all the recent work you did on your Brat! Make sure you get in all the crackas and holes form the top and bottom!! And wash after every storm! Link to comment Share on other sites More sharing options...
SoobieDoo Posted November 20, 2008 Share Posted November 20, 2008 just did some googling and found waxoyl http://www.robisonservice.com/articles/RonR_waxoyl.asp http://www.cumminsforum.com/forum/auto-body/49819-rustproofing.html That waxoyl sounds like good stuff. I may try that, as Kroil isn't meant for the purpose of undercoating. It's more of a penetrating lube, like pb blaster. Makes sense, with the added paraffin too. Link to comment Share on other sites More sharing options...
Uberoo Posted November 20, 2008 Share Posted November 20, 2008 im confused?We are talking about old subarus.I thought old subarus had a self oiling underside from all of the oil leaks? Link to comment Share on other sites More sharing options...
bratman18 Posted November 20, 2008 Share Posted November 20, 2008 im confused?We are talking about old subarus.I thought old subarus had a self oiling underside from all of the oil leaks? Mine doesn't anymore!! But even when it did it wasn't enough, it still rusted! Link to comment Share on other sites More sharing options...
subiemech85 Posted November 20, 2008 Share Posted November 20, 2008 my self-oiler broke and swapped in a self-ruster side panels behind rear wheels tend to rot away easily nice car with almost no rust, and want to keep it that way may try spraying diesel, had a vw pickup with leaky fuel tank seal, no rust back there Link to comment Share on other sites More sharing options...
ettev Posted November 21, 2008 Share Posted November 21, 2008 Make sure you get in all the crackas and holes form the top and bottom!! And wash after every storm! That NAPA chain and cable lube you use is in a spray bomb isn't it? If so that makes the process less cumbersome. How about everyone else? With regular oil how do you apply it? Do you thin it with kerosene or something first? Spray it on out of a garden sprayer or what? Link to comment Share on other sites More sharing options...
bratman18 Posted November 21, 2008 Share Posted November 21, 2008 That NAPA chain and cable lube you use is in a spray bomb isn't it? If so that makes the process less cumbersome. How about everyone else? With regular oil how do you apply it? Do you thin it with kerosene or something first? Spray it on out of a garden sprayer or what? Yes its in a can and actually if you take the nozzle and little red tube off the top of a WD-40 can and put it on the top of the chain and cable lube than you have an even more precise way of applying it...especially on the seams and in any holes! My uncle just always used, used motor oil and put it in a garden sprayer and sprayed the bottom of his vehicles with it. I guess that used motor oil was already thin enough! Link to comment Share on other sites More sharing options...
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