October 20, 2009I am wondering which is the best oil to use in my truck meaning 5w-30 or 10w-30. which will give the best performance, mpgs, ect? the oil cap on my truck says 5w-30 but when i got the truck from my dad he was using 10w-30, will one work better than the other? plz help!
Forums : Tips & Tricks : 5w-30 or 10w-30? (9336 Views)
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October 20, 2009there isnt much difference in the 2 neither will help you more than the other with MPG if its colder weather use the lighter 5 30 for cold starts or hotter use the 10 30 but it wont hurt if you use 5 30 or 10 30 no matter what
October 20, 2009ok thanks. so for the winter use 5w 30 and use 10w 30 in summer? i live in Michigan if that has any relevance.
October 20, 2009Yes! In Michigan use 5w in winter!
October 30, 2009yeah maybe run a 5w-30 synthetic. I just put that into my silverado and i think it runs smoother. But it could all be in my head! haha.
October 30, 20095W is the cold viscosity of the oil when cold and 30 is the viscosity hot. Newer engines have closer tolerances and need the 5W for cold startup . You will be fine with the 5W 30 in Michigan.
October 30, 2009The reason manufacturers went to 5w30 was for fuel economy.
The way I see it...if the engine was designed for it that`s what I`ll use.
October 30, 2009I always use 5w30 in my truck. I use mobil 1 oil and wix filter. Get the oil at walmart and its a lot cheaper.
October 30, 2009
I always use 5w30 in my truck. I use mobil 1 oil and wix filter. Get the oil at walmart and its a lot cheaper.
October 31, 2009Ill have to disagree with using 10w oil anytime in your truck. It was designed for 5w. In the summer 5w-30 is fine, in the winter 5w-30 is fine. Yes, use 5w-30 all the time. The engine is designed to use 5w-30 all teh time. Using anything else could affect your engine in a negative way. Prior to the 1950 it was common practice to switch oil grades, one for summer and one for winter. In the 50`s the dual purpose oil was introduced and made the practice of switching obsolete.
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