I have a 2000 GMC Savana 2500 with 83,000 miles on it. I'm about to change the oil, I bought 6 quarts of full synthetic Castrol Edge with titanium in the brown bottles. I bought 10W-30. The owner's manual calls for 5W-30. This van is used for hauling dirt bikes usually two at a time. Those weight about 225lbs each. And I'm thinking of hauling 3 also. The van will be driven in Florida.
There are a few reasons why I chose 10w30:
-Florida heat, guy at the shop said 10w30 vs 5w30 doesn't matter in Florida
-Hauling stuff, dirt bikes. Don't know if that even matters.
-Is it true that today's 10w30 is like the 5w30 of 15-20 years ago?
-Will syn 10w30 be more shear stable than syn 5w30 enough to even care about?
I want this van to last as long as possible, forever if possible. Will the 5w30 extend engine life because of the better flow at lower (startup) temps? If that's the case, then why not use 0w30?
Also, do they recommend thicker oils for the same cars in Europe?
I am ready to take the 10w30 I bought back and exchange for 5w30 if that's the best thing to do.
There are a few reasons why I chose 10w30:
-Florida heat, guy at the shop said 10w30 vs 5w30 doesn't matter in Florida
-Hauling stuff, dirt bikes. Don't know if that even matters.
-Is it true that today's 10w30 is like the 5w30 of 15-20 years ago?
-Will syn 10w30 be more shear stable than syn 5w30 enough to even care about?
I want this van to last as long as possible, forever if possible. Will the 5w30 extend engine life because of the better flow at lower (startup) temps? If that's the case, then why not use 0w30?
Also, do they recommend thicker oils for the same cars in Europe?
I am ready to take the 10w30 I bought back and exchange for 5w30 if that's the best thing to do.