Founder of S15OC
Shamelessly lifted from a sister forum...
So who still thinks you need to change your oil every 3k
Have a look at this
This is the latest oil analysis data back for my car. Now you may see its hightlighted the iron content as being quite high (Fe) as well as the silicon being a little high (Si) Now in 3000 this would be the case and slight cause for some concern but take a look at the number in the bottom right corner Thats right 13000 miles No fooking way i hear you all say Yes as an experiment I put my faith in using a quality oil and the theory it is capable for 60000Km (although thats normal passenger cars and not modified turbo'd applications) Seeing as we had some results back from members who had done 6-7k with no problem i thought i would push it a bit more :wack:
Fuel dilution was 2.8% which for the mileage isnt terrible (I had 4.8% last time for just 3000miles) and is probably just down to the APT map (i know Gary likes to tune on the conservative side)
The amazing thing is the oil is still fine, OC (Oil Condition) is low (same as when it was put in) and the TBN has only dropped from 8.3 to 7.3 (normally at the end of its life around 5.0)
Hopefully this will open a few peoples eyes and dispell the internet/tuning bollox of changing your oil every 3k as in this simple exercise i have saved myself the hassle of 3 extra oil changes and around ?100 :thumbs: