edalexandr Posted March 11, 2004 Share Posted March 11, 2004 yeah i just like to know the best weight oil to used in my 78 brat runs great , no burning oil but has close to175,xxx miles , i did change before with 10-40 but what you think of 20 weight or so is this ok?? :wave: Link to comment Share on other sites More sharing options...
nutt7 Posted March 11, 2004 Share Posted March 11, 2004 a lot of people run 20w 50 from what I hear...do a search and you will discover lots of good arguments/opinions/testimonies etc. Link to comment Share on other sites More sharing options...
edalexandr Posted March 11, 2004 Author Share Posted March 11, 2004 yeah i guess they have there ups and downs:argue: Link to comment Share on other sites More sharing options...
scubaroo Posted March 11, 2004 Share Posted March 11, 2004 :wave: hi all. I personally would not use 20/50 in a 4 pop. Heavier oil decreaces Hp, and it does not lubricate any better. 10/30 10/40 is fine all year, if it gets really cold 5/30 in winter is OK for normal driving. My choice in oil is Castrol. Link to comment Share on other sites More sharing options...
The Scooby Posted March 11, 2004 Share Posted March 11, 2004 ya but thicker oil helps with low oil pressure... but anyways i run pensoil 10w30, i thnik, if not 20w30. Link to comment Share on other sites More sharing options...
edalexandr Posted March 11, 2004 Author Share Posted March 11, 2004 well i just change my oil to 20 weight i will try it if not i will go back to 10 40 Link to comment Share on other sites More sharing options...
asavage Posted March 11, 2004 Share Posted March 11, 2004 Good/tight engine (except Turbo): 10W30 Good/tight engine (Turbo): 15W40 Loose/used/worn engine (any): 20W50 Thrasher/beater/smokescreener: SAE30 or worse Main thing is: keep it clean. Don't "push" the mileage, change it often. (My '93 owners manual has 5W30 listed as an option, but only up to about 40°F. IOW, winter only, for the 48 States). Brand opinion: like armpits, everyone's got a couple. Keep it clean, I don't think it makes a whole lot of difference (but I run Mobil 1 today, FWIW). Link to comment Share on other sites More sharing options...
scubaroo Posted March 11, 2004 Share Posted March 11, 2004 :wave:HI About 2 or 3 years ago I read an artical about oil weight. the then new model H***a was out and required 5w/20 and question were being asked about the oil weight. I was also woorking at a oil change shop and had to inform custumers that we did not carry the oil for there H***a car and to take it to the dealer for there oil change. the atical stated that the new engines were of very tight tolerances and using a heavyer oil could cause leakage past the seals. In a high millage american V8 like my 88 plymouth fury cop car 378000 miles 20w/50 our 207000 mile 90 legacy 10w/30 or 10w/40. Link to comment Share on other sites More sharing options...
torxxx Posted March 11, 2004 Share Posted March 11, 2004 I run 15w40 Napa Fleet Oil (comes in the gallon jugs) and 4 to 8 oz of Marvels Mystery Oil. I change oil/filter every 2k miles. Havent had an oil pressure problem or bad ticking since the change over last year.. I expiremented with 10w30 this winter and maybe even 5w30 for one oil change and my car did not like it. Link to comment Share on other sites More sharing options...
WJM Posted March 12, 2004 Share Posted March 12, 2004 Ive always used 10w30 mobil 1 synthetic....for the turbo wagon. I think the bottom end had about 60k~80k on it.... I am using the NAPA 10w-30 synthetic in the DL right now. The DL has 77.6k miles on it. Link to comment Share on other sites More sharing options...
Snowman Posted March 12, 2004 Share Posted March 12, 2004 From what I've seen, Mobil 1 synthetic is the best oil, but you shouldn't switch to a synthetic unless your engine has recently been rebuilt or resealed, otherwise it will 1: leak and 2: the higher detergent properties will loosen up nasty crap that has found it's place over the years, possibly with ill effects. I just rebuilt my engine (less than 200 miles on it), and I'm breaking it in on the best dino oil I know of, which is Castrol GTX. After the first change at like 300 miles to get any crap out of the engine and the first real oil change at 3000, I'm switching over to Mobil 1 10w30. My other engine was run to its deathbed on that stuff (had really bad rings) and I'm convinced that I wouldn't have made it that far with any other oil (except maybe 15w40 diesel oil). For your brat, I would go with Castrol GTX 10w40, or if you're worried about oil pressure, go with 15w40 or 20w50. Link to comment Share on other sites More sharing options...
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