About 6 months ago I purchased a very nice 92 LS400 with only 72,000 miles. I've put on about 11,000 since then, "highway miles". The previous two owners were "mature" in age and took car to dealer for most of services. The second owner decided to quit paying $90/hr and took it to another place, who decided to do a lot of preventative maintainance, such as put in the green anti freeze, put in Dextron III ATF, and "clean the distributor rotors", and some other mysterious "repairs". No wonder the 2nd owner was so willing to part with this "hanger queen". Fortunately this took place within the past year, not not too many miles of "after market" maintainance.
My first tasks, after getting the vibrations out, alignment and balancing, and getting right rear wheel "straightened", was to immediately put in Amsoil in engine, tranny, and differential. Also a radiator flush. with Toyota/Lexus red stuff.
It's been running very fine, but a bit harder ride than my wife's 96 with 185,000 miles.
Problem is for the past few weeks, while cruising (about 80 mph), just going with the flow ;) , the low oil pressure light illuminates. I let off gas, and the light goes out. This has happened about 15 times so far, and the light never stays on more than 2 or 3 seconds, once about 5 seconds. The temperature gage is always stable (both cars always at just under 1/2 heat range).
Of course the manual tells me to pull off the road immediately and call the Lexus dealer. The oil level is full, and no other indications of a problem.
Has anyone else ever experienced this with their LS ? Trying to decide next step. Not willing to open up my wallet and ask the dealer to help themselves. They are definitely in it for the "business".
Thanks for suggestions.
Earl