Originally Posted by MaynardGKrebbs
Since we used our most wore out piece, we determined that 750 hours was a safe interval. That cut our oil expense by 2/3. The rest of the fleet was changed to synthetic, and placed on the 750hr. schedule.
That Komatsu excavator was sold , still running fine with excess of 20k hrs.
I'm not here to praise any particular brand of oil, but if you can trust one to lube a $20,000 engine, in a crappy environment. You should trust it to work in your bike or mower. Just pay attention to the rating, make sure it exceeds what the engine manufacturer requires, and that the viscosity is correct for conditions.
750 hours at 40 mph overall average, Idling, etc, is 30,000 miles.
based on the 1st post, Blackstone labs said to run our car another 16,000 miles on the next change and sample it again..... I chickened out and it is being changed at roughly annual in December..... it is now almost May and it has not been changed yet....
I think your experience agrees very closely with what the lab told me to do.
My son, changes the oil filter on his Cummins engine every six months, and runs the oil two years..... sometimes, that is a lot of miles...
on my 2001 Suburban at 212,000 miles, it is loosing about 1 qt every 2,000 miles, or less. Not sure exactly... I just keep topping it once in a while. It has 5w30 Mobil1 in it.... I am thinking to just change the filter on it, and just keep topping it off. We just bought the truck a year ago this month.
It runs like a top, steering is tight, transmission is perfect, pulls the 8,000 lb RV trailer quite well.
it is a 4x4 which is great for a heavy trailer that gets off pavement sometimes.