Semper

Evening folks.

MY07 WRX. 420bhp. Ecutek (Mr Rawle special). Mahle pistons. STI9 rods.

Using an obscene amount of oil. Thick end of a litre in 250 miles.

No visible leaks. Oil catch tank is now VTA. Some smoke on idle when cold. Smoke when I boot it (once oil is warm). No smoke on idle when warm.

I understand that forged pistons have bigger clearances so I expected more oil usage, but clearly something isn't right. Any suggestions?

Many thanks in advance!

Stew

jonny gav

iTrader: (1)

that is quite a lot mate, forged pistons do run a larger clearence than standard pistons so you do get some oil usage compared to standard pistons, you could have a leaking turbo oil seal, this could contribute to a high volume of oil usage too.

Semper

Thanks Jonny

Turbo oil seal sounds like it may be the boy. Bitch to change.

Any more thoughts?

dynamix

iTrader: (3)

What turbo is that on Semper?

Semper

TD05/06 20G

dynamix

iTrader: (3)

Sounds like a dying turbo. Time for a BB turbo

I am very surprised with 420bhp out of a 20G though - must be the highest figures from one of those that I have heard.

Semper

Another was bought at same time as mine (from Mr Harvey) and made even more!

May be time for MD321...but financial constraints at the moment

dynamix

iTrader: (3)

What dyno was that on?

Semper

Dastek at Motorscope (Northallerton).

Just need to get this oil usage sorted and I'll be a happy boy regardless of what it power it makes.