The manual for my '08 says to use 5W-30 for the six and 4.7 and 5W-20 or 0W-20 for the 5.7. It does mention "for best fuel economy" use the lower weight.
0w-20 vs 0w30
This is not a motor oil question or review, just an experience. I took my truck to the dealer last saturday for them to change my oil (first mistake). I bought 2 gallons of amsoil ss 0w-30, knowing our truck takes 7.9quarts. 1 gallon equals 4 quarts, so 8 quarts of oil and an amsoil filter. The dealer calls me back and states that I have the wrong kind of oil, the truck takes 0w-20. I tell them that I know, and that I want to use 0w-30 because I tow. The dealer then tells me that the 0w-30 may cause a check engine light!!! I told her she was full of it and go ahead and change it.
Two hours later, they call me back and the truck is ready, but it is a quart low on oil! I hit the roof! After much deliberation about their intelligence, I speak with the tech, and he claims that the amsoil fiter is larger than the toyota filter.? When I check the oil, of course it is not a quart low, just a hair below the full line.
Anyway, I wanted to let anyone know who is on the fence about using 0w-20 or 0w-30 There is no check engine light that warns you have the wrong oil, and that the truck is VASTLY quieter and smoother with 0-30. I never liked all the clank clank and diesel sounds my truck made with the 20 weight oil. It is like a whole different beast (ie, no clanking) now that I switched to 30 weight. I will never put that 20 in the truck again! I don't care what the book says about 20 weight, I want my truck to last, and 30 is the way to go for me!! No noticeable drop in MPG either.:machinegunner:
Two hours later, they call me back and the truck is ready, but it is a quart low on oil! I hit the roof! After much deliberation about their intelligence, I speak with the tech, and he claims that the amsoil fiter is larger than the toyota filter.? When I check the oil, of course it is not a quart low, just a hair below the full line.
Anyway, I wanted to let anyone know who is on the fence about using 0w-20 or 0w-30 There is no check engine light that warns you have the wrong oil, and that the truck is VASTLY quieter and smoother with 0-30. I never liked all the clank clank and diesel sounds my truck made with the 20 weight oil. It is like a whole different beast (ie, no clanking) now that I switched to 30 weight. I will never put that 20 in the truck again! I don't care what the book says about 20 weight, I want my truck to last, and 30 is the way to go for me!! No noticeable drop in MPG either.:machinegunner:
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