I have used the Rotella T6 5W40 since new and it shifts great. I only have 2500 miles on it and have nothing to compare it to. But it has shifted smooth with no problems. Maybe I need to try something else for comparison?
Mine does shift better with the regular good ole Rotella, and it is cheaper too.
I know the Rotella T6 is a group III oil and was thinking maybe a true group IV synthetic would be better like the Mobil 1 4T 10w40. I was told the Mobil 1 turbo diesel truck oil would be better than the Rotella T6. Anyone try it?
Not sure that it is actually a group IV.
Sure, but you'll have to wait awhile as I just changed it last month, switched out the Maxima Ultra with Redline 5-40 bike oil. I plan on having 3000 miles on it by Mid Oct as I will be taking on a few long trips between now and then.
For all thearguingdiscussion about oil on the 'Net, there is really precious little information (data) available. The only research specifically about motor oil performance in reciprocating auto engines that I am aware of was a report done by Consumer Reports some years ago. IIRC it was a 60K mile test starting with either new or rebuild engines, measured before assembly, and then installed in NYC taxis and used with various oil types and brands. The results were inconclusive: all oils seemed to perform the same.
3,000 miles in six months, including "a few long trips", sure doesn't sound like you're riding it much. Just sayin'.A long trip is > 3000 miles IMNSHO
That was a lame test for the following reasons:
1) The cars were taxis run around the clock- they didn't have cold starts where most wear occurs
2) The cars were Chevy Caprices with stock gearing- peak power with stock gears doesn't occur unless you are doing over 45 in first, something that is very difficult to do in NY traffic. The driving conditions were pretty tame for these cars (I have an Impala SS).
3) Funny how they want to make things relevent to their readers, yet chose a car that is most unlike what readers have- a perimeter frame car with a tq rich ohv V8
that loafs through the city.
3,000 miles in six months, including "a few long trips", sure doesn't sound like you're riding it much. Just sayin'.
As my father told me: The type or brand of oil is not important, just make sure it has oil in it!!
He gave me this advice right after I burned up the push mower