high oil consumption, oil leaks across the piston rings Options

[HLANG]

I just recently did a complete 2L engine overhaul and installed forged JE-Pistons with Biral Cylinder Liner kit 96 mm bore. The compression is fine, the engine runs well but I experience a consumption of 1 liter oil per 1.000 Km. After I checked the combustion chamber I found too much oil deposits on the spark plugs and the pistons. The ring gap of the piston rings is in tolerance so I wonder why there still passes so much oil from the crankcase into the combustion chamber.

[Superhawk996]

1000 km =621.371 miles . . . So, decimal in wrong position . . . . 1 liter is 0.26 US gallons (approx 1 quart). . . Monday after a 3 beer lunch? (IMG:style_emoticons/default/confused24.gif)

Hopefully OP has a little more background and/or has access to a leak down gauge.

Note: 1L of oil consumption per 10,000 km isn’t plausible for an air cooled engine design with origins that date back to the 30s.

[wonkipop]

1000 km =621.371 mi decimal in wrong position . . . . 1 liter is 0.26 US gallons (approx 1 quart). . . Monday after a 3 beer lunch? (IMG:style_emoticons/default/confused24.gif)

Hopefully OP has a little more background and/or has access to a leak down gauge.

Note: 1L of oil consumption per 10,000 km isn’t plausible for an air cooled engine design with origins that date back to the 30s.

right.

something had to be wrong there.

but even my old type 3 squareback never used anything like 1/2 to 1 litre per 1000km.
at most it might have gone through half a litre per 3000miles going back in time between services (oil changes) which i used to do every 3000 miles max. its speedo/odo was still mph but aus had gone metric and oil was sold in metric containers. i reckon i used to do about 1/2 a litre in 4,500 km.

as to the 914, it uses precisely zero oil between changes.
and i am coming up to a change now having covered about 3000 mile since last change.
(my odo is still a US imperial mph gauge). absolutely zero oil consumption.
or its undetectable.
still the original engine never been apart. sitting now at near 48000 miles.
just on 4000 added since reawakening it 5 years ago.

i'd be a little concerned using a litre of oil every 1000 km or 620 miles if it were me.
seems like a lot - for an engine in good condition.
1/2 a litre would be not such a worry.
but i guess it depends how much high speed cruising in hot weather you do?