Leakdown/Compression check? Bad oil consumption 13 LSV

[mmandley]

I would expect some oil usage as the chart displays but no engine really should be using a quart per tank of fuel. A tank of fuel is only 10 hours in most boats.

You can do a compression test but that doesn't mean its the lower end, it could also be the valve train. You can help isolate the two buy adding a little oil during your compression test. If the results get better, your rings are leaking by, if they stay the same the valves are leaking by.

Also it could be the valve seals, which you mostly notice when a car is at idle, and then as it accelerates it leaves a cloud of smoke.

In my 325 LSV I burned about a quart every 25 hours.

In the Mojo with the 345 Surf engine I burn a quart per season or 100 hours.