Nopstnz

Hey guys,

I have been looking for an 8 for quite a while now and I have gotten back several compression test scores from owners who are selling. I don't know a lot about compression, but I do when it's poor it'll kill your engine

My question is this, other than maintenance and upkeep on your engine, does time have any bearing on compression loss in a rotary engine? For example, say I had a compression test three years ago and the results were standard. If I only drove seven thousand miles, and changed nothing about how my maintenance was done, would it unreasonable to expect significantly lower compression scores three years later?

Reason I am asking is one of the guys I am talking to about buying his car has this exact predicament and he doesn't have the time to get another test at the moment so I am trying to gauge the actual condition of the car's engine based on results from 3 years and 7k miles ago.

Cheers

Loki

iTrader: (1)

Time by itself won't cause compression loss. Compression loss is the wearing of metal parts, which doesn't happen when the car doesn't move. However, there's a difference between 7000 miles in a well maintaineed car with fresh coils, spark plugs and healthy catalytic converter, and 7000 miles on a bad cat, bad coils and other problems.

So if you have confidence the car was well taken care for those 7000 miles, then by all means go ahead. If you think it previous owner has made mistakes or is plain BSing you, then you'rebuying those mistakes. Every case is unique and everyone is comfortable with different amounts of risk

NotAPreppie

If he doesn't have the time to get a compression test, you should make the time to borrow the car and get the test done.