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Originally Posted by 97 SL320
Did you see the car drive in when returned / did you start car soon after it was returned?
Any idea if he used Bio / veg or other non standard diesel?
Wrong type of oil: Not a problem even if filled with gas oil in the short term. ( As in 10's of K miles )
How many miles does this car get per Qt and under what conditions? ( round town sub 40 MPH will use less oil per mile due to low loads , highway 60 + will use more due to higher speeds / loads. ) How many OT does this car hold?
No start due to out of oil: If the engine is cranking at normal speed, not an oil problem. The first parts of an engine to suffer oiling deficiency / locking up will be the connecting rod bearings, next will be main bearings. Pistons / rings / valve train won't going to be a problem.
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The car did drive when it was returned. However, it was warm when I drove it to my other place (1/2 mile). I went to start it a few days later, and it took a good 10 minutes to get it to run. It would "run" with the starter engaged, but soon as I let off the key from the start position, it would die. I finally got it to run enough on it's own to get it where I could work on it. I ran it on veg years ago when I got it, but have only had Diesel in it for the last year or so. He only put D in it the entire trip. I only drove it once or twice a week around town, so it didn't use much oil. I think I had to put a quart in every few months. I will ask how many quarts were used for the trip. His trip was all highway, and some of it pulling an empty motorcycle trailer (maybe 300 pounds?). I definitely need to do a compression check. A bummer though, I just changed the glow plugs after it took the 10 minutes to get running. I could (should) have checked the compression then, it would have been easy.