Quote:
Originally Posted by justa25thTA
and the 3000 mile change was pushed by the oil manufacturers who want to sell oil. I believe the guy who is warrantying my motor.
|
The warranty expires long before the effects of extended OCI will be an issue.
I change my oil when the indicator says 30%, which seems to be almost exactly 6,000 miles. I never do short trips and practically live on the freeway at 75mph in 6th, 30 miles is my shortest regular drive. I feel comfortable with my oil change intervals. I also use WIX oil filters because the ACdelco units have plastic cores and have a very slim but possible chance of failure.
On my motorcycles,I change the oil every 2500, whether I've been drag racing or just commuting and doing freeway wheelies. They seem fine.
I have noticed that once the oil has gone visibly black and dirty, the car will make the next change of oil dirty quite rapidly. A short oil change interval with a bit of added detergent (seafoam or atf right before oil is changed) seems to clean things up quite well. Also, diesel oil works GREAT for keeping things clean and protecting flat tappet cams from wear when you have a vehicle that calls for that weight. I've ran Rotella T6 for many miles in several vehicles and motorcycles.
Edit: shell makes a 5W30 T6 now, I will be trying it soon.