In an article on synthetic oil today on the web in AOL the following appears :
"At one time, those who switched from conventional to synthetics had to stick with synthetics-there was no going back. Synthetics expanded the seals in the engine; then, when conventional motor oil was used, that engine sprang multiple leaks.
Usage Now, while the companies don't recommend mixing or switching back and forth, one company's synthetics are fully compatible with others and compatible with conventional oils. The source of compatibility problems was high levels of ester in the earlier synthetics. Considering the consequences, it's best to verify this compatibility, either on the company's website or with your trusted mechanic."
So when I said that switching to synthetic made my S420 engine leak, I was right!! And then Old Heavy Carl, the local Stealership here in Greenville, ran out of Mobile 1 and put dino oil back in and I found out only by accident! So I never switched back and was mad ever since - about 6 years!!!!! And no one in here would believe me - kept saying the synthetic oils didn't make the engine leak. WELL THEY USED TO
------ SO THERE !!!!!! HAHAHAHAHA !!!!!!
Of course the dratted engine ran fine till I dumped it this last week and it had 147,800 miles on it. Sounded real good, actualy. Of course the water lines would blow out, etc.
mcbrue finalyprovenrightly under the bridge in the trailer down by the river
06 Rexus LS 430