Yesterday I changed the oil in my 92 SSEi...Took it for a ride ...ran great...an hour later drove it 20 miles then I passed a car at 87mph...Now it lost all power at high speed!!!! Any Answers out there...Roy

Hows the car running otherwise at idle and while driving normally?

What is the car doing when you try to reach high speeds?

Did you check to make sure you didnt throw a belt for the Supercharger?

We will need more info before anyone can really help diagnose the issue.

also how is the oil pressure.?

Is it just at high speeds or at higher RPMs? It could just be a dirty fuel filter and you just noticed it now. If you have never replaced it before you might as well, they are only like $12 and easy to replace.

Also tell us what your oil pressure is at.

Black94ssei, the supercharger belt also runs the water pump. But I agree on the oil pressure. What is it at idle, wide-open throttle, regular driving, and coasting?

Good Point. Ive heard that some try to run without the SC belt so I figured maybe I ask if it went. But i can see now where the Oil Pressure may be of concern.

91-95 L67'* share a belt for the WP, AC, and SC.

96-2003 don't. They can run without the SC, while S1 (91-95 L67) can only do so for very short periods of time before kaboom, clatter, bang, thud.

Thanks for that info. Im still learning allot about the differences between these engines.

In the meantime, we still need for Roy to provide more information to go on. Otherwise it'* all guesswork and sheer luck. At this point we have no reason to believe or not believe that this is related to the oil change.