Forum Discussion
dodge_guy
May 04, 2015Explorer II
Ductape wrote:
CAFE does not apply to vehicles in this weight class.
Interesting how some prefer the advice of random strangers to reading the manual.
Not to say there are no technically sophisticated enthusiast groups, but pages here yield nothing but anecdotes and opinions. BITOG is the place to go if you have a serious question on this subject.
Well my manual states to use 5W30. Then some genius decided 5W20 was the way to go and sent out a memo to just about everyone to use 5W20. Basically they switched to cut down on oil inventory. Much easier to stock 1 less weight oil. And yes there reason was mileage. I know HD trucks at the time weren't included in CAFE, but the newer ones are. And going back some years they got a small helping from the government for saying they could increase mileage going back a few years. Believe that is why they did it. It was to help them out! We will never see the savings by running a lower weight oil!
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