Greg
Did you run the compression test with a cold engine?, that should
explain the rising readings as more oil will then deposited on the
bores/rings, making a better seal . Repeat with a hot engine and compare.
Jet black oil is caused by blow by of the burned fuel gasses passing the
cilinder bores/pistons.
Oli pressure seems a bit low, one would expect 50psi+ on a healthy
engine, but I am not sure what the specs are on these engines.
Kees Oudesluijs
NL
Greg Mandas wrote:
> Bob,
>
> Thanks for the response. I now know I have one more base covered.
>
> I'm sure I'm burning it as well as leaving my calling card. Occasionally I
>get a bit of blue smoke on startup and my drippage makes it hard to park when
>out and about. It has lead to a couple of embarrassing moments, quickly
>forgiven because of the car's coolness factor.
>
> As the car and I build trust and faith in each other, my driving is mostly
>short 20-30 miles jaunts. I'm thinking that means I'm loosing more through
>dripping than if I made longer trips. Also, the milage in my original post
>were SWAGS (wildass guesses), so basically, I have no idea what's going on. I
>should take it to my mechanic for a leak-down test.
>
> If you don't mind me droning on ...
>
> I think the rings are good because the compression test I did had good but
>interesting results. Starting at cylinder #1 the compression was 165#. From
>the there the numbers rose incrementally, 165#, 167#, 170#, .... until the
>6th which had 180#. Is this a symptom or coincidence?
>
> Oil pressure runs 60# at startup and 25-30# when heat saturated. I'm assuming
>jet-black oil is customary for these engines.
>
> Regarding oils in modern engines, my daughter's Honda Civic Hybrid runs
>0W-20.
>
> Greg
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