My Rb25det Burning Oil

[sam5709]

ok basically i got a 96 r33 gtst with the following mods

-hi flow turbo on 13 psi (no after market engine management - stupid i know)

-hks pod with metal intake

-splitfire coils

-cooler

-split dump to 3 inch straight through exhaust

-hks adjustable wastegate - no other form of boost control

thats about it, i use redline 10W40 engine oil as recommended by redline reps and a known redline distributor here in perth,

my oil shows full on the dipstick and basically i drive about 60km to and from work everyday with a bit of foot down action here and there!, by the end of the of the working week the oil is down to low on the dipstick, just wondering why this is happening?? should i change to a different type of oil, but if i do change, why only is it burning now after never burning any in 2 years?

any help would be great

[paulr33]

well check for obvious leaks.. look at the sump bolt, check the oil filter, wipe it with a rag, then check again in a day, does the oily goo come back?

are you checking the level at the same engine temp each time? does your oil pressure vary? leak marks on the driveway where you park ?

does it blow smoke ?

[sam5709]

there isnt a single drop of oil any were, iv just gone and checked all things from were a leak could be, i check the oil when the car hasnt been running for a while and always on a flat surface in my garage, my oil pressure gauge has never shown anything unusual,

it does blow out what appears to be black smoke in the high revs wen i am giving it sh*t but every one says that it is just unburnt fuel because my car is running a bit on the rich side, the guy that did my dyno runs also said its unburnt fuel.

[paulr33]

any signs of oil near the turbo? like the seals could be shagged or something, but thats a lot of oil to leak out the seals

what about the cooler pipes etc, do you see any signs of oil in there, undo one of the silicon joiners and check

again high unlikely you are loosing that much oil from say the turbo seal, but at least rule it out

[nizmo_freek]

Something isnt right, if your losing that much oil over 60km then you would surely be driving around with white/blue smoke poring from the exhaust everywhere you go, either you are checking your oil level incorrectly (allthough i dont see how anyone could get that wrong) or you have a mojor leak that you havent found yet, even though you have said you have checked everything, have you actually jacked the car up and had a look underneather it?

[sam5709]

ok just took one of the cooler pipes off, 100% clean inside, no signs of sludge or anything in there, the egin bay is squeaky clean of any oil etc, iv just looked under and all through the engine bay again and there is nothing, also i change the oil very regularly so its always been very clean but lately the oil goes pitch black after a week, sort of looks like the oil has never been changed,

im def checking the oil properly and also the guys at work have also checked, aswell as my boss, its been happening for the last 3 weeks, iv just been topping it up, i think the next step is to take it to a workshop and see whats happening, hopfully nothing too serious

even the guys at work have been saying its very strange

[sam5709]

ok just tried something that got suggested to my, i started my car, put a card board box about half a meter behind the exhaust and revved it to about 3000rpm a few times, looked at the cardboard box and has black shit all over it with the consistency of water, something is f*kked lol, but car still boost hard all the way to redline tho??