quote:Originally posted by ADFD1:
Nice example Bear. Although you used Gear oil for your example, we could easily substitute 0W30 in an engine that calls for 5W20, with no other options. I get the point. It would be a long drawn out uphill battle.
Stick to approved fluids, and mfg recommended intervals, in the suggested grade, and don't play games while under a warranty. Sound advice, and exactly what the service writer told us when we had my GF's Jeep in for a warranty issue. He flat out said, DON'T USE A 30 GRADE OIL IN THIS JEEP! IF THERE IS AN OIL PROBLEM WE WILL PULL A SAMPLE, AND THAT 30 GRADE WILL BITE YOU IN THE BUTT! IT CALLS FOR 5W20, USE 5W20!
Yeh......that worked at real well for some. Play it safe,really,are you sure?
For those of you who think you are safe doing 3000 mile oil changes with receipts,think again.....
<<<<<Manufacturer warranties might refuse to cover oil sludge damage by blaming you, the customer, for poor maintenance habits or neglect—even if you can prove you changed the oil every 3,000 miles. Without warranty protection, engine replacements are $5,000-$10,000. SAAB, Toyota, VW, and a few other manufacturers have some limited coverage for sludge damage.>>>>>
In sum..........playing it safe as some have said,may not be.....playing it smart!
The smart move is to use group IV synthetic,don't get sludge in the first place,and you won't have to worry about warranty issues......because you probably won't have any issues to deal with.