Leakdown results and oil use
 

Hi there,

I posted a topic a week or so ago about my oil consumption, about a quart every 500-600 miles, and it was suggested I take my cab in for a compression check and leakdown.

I've been nervously waiting for the results, which just came in - the car looks awesome, 2%-5% leakage with 190-200psi.

The only thing my mechanic could come up with is that we're using a very thin oil - a German synthetic, 5w-30 - he wants to do an oil change to a thicker M1 or GT1 synthetic and see if that stops the usage.

Any thoughts on this? Thanks as always!!!

Hi Rick:

Those leakdown figures are excellent.

IMHO, you should not be using an oil that thin unless its well below freezing.

If you use 15w-50, your engine will be much happier in your climate.

What a relief that leakdown test has to be for you! :cheers: No point in doing anything more complicated until you've tried a thicker grade of synthetic, tho I'm sure no expert. Joe W