BAD gas maileage in the winter....
#11
12-10-2010, 04:50 PM
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#12
12-10-2010, 11:27 PM
Record Breaker
ok, so where to start... vehicles dont have a winter or summer mode set into the pcm. theres no such thing. the only thing that changes in the pcm from winter to summer is how long it stays in the open loop cycle. your mechanic is raping you for fixing nothing....
second, if you dont want your motor to burn oil, you'll wanna let it warm up for at least 10 min, and not drive it hard until its fully warmed up (ie. hard acceleration). the intake plenum was not designed properly and has a huge oil burning defect.
third, what was your gas gauge at when you started it and let it idle for 30 min shadowthedakota? couldnt have been too far off the e line to begin with. ive idled mine for an hr because i locked the keys in by accident and the gauge didnt budge. in all reality, you have about 3 and a half days before you run outta gas at idle from a full tank..
second, if you dont want your motor to burn oil, you'll wanna let it warm up for at least 10 min, and not drive it hard until its fully warmed up (ie. hard acceleration). the intake plenum was not designed properly and has a huge oil burning defect.
third, what was your gas gauge at when you started it and let it idle for 30 min shadowthedakota? couldnt have been too far off the e line to begin with. ive idled mine for an hr because i locked the keys in by accident and the gauge didnt budge. in all reality, you have about 3 and a half days before you run outta gas at idle from a full tank..
it was between 1/4 tank and E
#13
12-11-2010, 04:00 PM
This simply isn't true. All the plenum bypass valve does is equalize the pressure in the crankcase with that of the surrounding atmosphere. Once the truck has run for a few seconds and the oil has covered everything in the crankcase, you're good to go. The temperature of the motor will not have any effect on oil leaks. My motor has over 160,000 miles on it, still running strong, and none of the previous owners ever let it warm up in the winter. I do agree however that the truck should be driven gently until the motor fully warms up.
#14
12-12-2010, 12:03 AM
Idling kills gas mileage. And as it was stated above, the colder temps cause the engine to take longer to warm up. When was the last time you changed the thermostat? The "winter" gas around here is oxygenated. In laman's terms, they add alcohol to the gas. It's mainly used in heavily populated areas to help reduce tail pipe emissions which contribute to winter smog that can form. The addition of this alcohol also has the side effect of killing gas mileage which causes the truck to use more fuel. Go figure.
Last edited by JDakota92; 12-12-2010 at 12:05 AM.
#15
12-12-2010, 02:20 PM
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you guys dont know about the intake defect then do you? our intakes are made out of aluminum, and the plenum plate is made out of steel. because of the different expansion rates, the plenum gasket blows out all the time, and causes the engine to burn oil. hughesengines.com offers a plenum fix to solve the issue. it replaces the stock steel plenum with a 1/4 inch aluminum plate and aluminum gasket to match. but without the fix done to the engine, if you do not let it warm up AT LEAST 10 min, and then you drive it hard cuz your in a rush, your gunna cause the motor to burn oil really bad. i know from experience. mine was blown out in 2 spots because of the way i drove it in the winter. i know idling kills gas milage, but its whats gotta be done if you dont wanna order the fix and dont want the motor to burn oil...
#16
12-13-2010, 09:36 PM
Record Breaker
you guys dont know about the intake defect then do you? our intakes are made out of aluminum, and the plenum plate is made out of steel. because of the different expansion rates, the plenum gasket blows out all the time, and causes the engine to burn oil. hughesengines.com offers a plenum fix to solve the issue. it replaces the stock steel plenum with a 1/4 inch aluminum plate and aluminum gasket to match. but without the fix done to the engine, if you do not let it warm up AT LEAST 10 min, and then you drive it hard cuz your in a rush, your gunna cause the motor to burn oil really bad. i know from experience. mine was blown out in 2 spots because of the way i drove it in the winter. i know idling kills gas milage, but its whats gotta be done if you dont wanna order the fix and dont want the motor to burn oil...