Best Oil for Summer Driving...
So I have been doing a ton of reading, on many things. My newest question/comment is on the best oil weight to use for summer driving.
Ideally I'd love to use something like 20w50, which is the thickest grade thus keeping the metal on metal of the moving parts to a real minimum, however that is an unlikely weight for an xj.
I am curious what you all think. Would a 20w in the summer be viable? Might get me less mpg because it's flow is slower, but would the love it would give to my gears and other moving parts be worth it?
I am thinking that a 10w, or maybe even a 5w would be best for MPG and summer driving.
Also I find it interesting that if you maintain your oil filters well you can run an engine 500k+ miles on the same batch of oil :: ) Something I never knew. Doesn't surprise me, lots of places would be out of business if we all ran our engines on one set of oil and just maintained/changed the filters.
Look forward to reading peoples responses.