darsdoug Posted May 3, 2016 Share Posted May 3, 2016 Is there any truth in whether or not the ECU can tell the difference between summer and winter blends of gas? Does it need to re-learn that also? Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted May 3, 2016 Share Posted May 3, 2016 assuming all sensors are working normally, the ECU can adapt to changes in fuel in a coupla drive cycles. Link to comment Share on other sites More sharing options...
Fairtax4me Posted May 4, 2016 Share Posted May 4, 2016 For the majority of cars it doesn't matter. The major difference in summer vs winter gas is its volatility. Basically its ability to vaporize. Winter gasoline blends are designed to vaporize more easily because cold air makes it harder for the fuel to vaporize. Remember, it's the vapor that burns. The ECU may see a difference in oxygen content in the exhaust. But it will adjust to that within a few seconds. You may have a problem running summer gas in the middle of winter on a below freezing day. You may have a problem running winter gas in summer on a 100° day. In the middle times you shouldn't notice a difference. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now