ajg617

Have an A4 1.8T with about 80K miles. Previous owner had oil changed with Mobil1 at a local Audi dealer every 5K miles. I know that Audi is recommending synthetic because of the sludge problem. But, every other Turbo I've owned has not taken well to synthetic. Oil seems to be getting by the seals on this one. Seems a bit premature for 80K car. Anyone else have a similar experience?
Thanks,
AJG617

qfrog Ti20

The turbocharger's internal seals? The oil feed/return lines? What seals... what are you looking for a reason to use junk oil? Somehow you've got it in your head that synthetic oil causes leaks because the synthetic oil is leaking. This is just not the case on the 1.8T engine. Engines leak oil when they get old... 80k is not a new engine... given that most 1.8T's need a valve cover and cam adjuster seal set every ~40k miles, some leakage isn't abnormal.

ajg617

I'm blowin oil through the turbo's internal seals. BUT, I owned two Supra Turbos and they blew Mobil1 by the turbo seals like crazy (and I owned them new). Also, my Dodge Cummins Turbo Diesel docs are very specific about not using synthetic oil. AND, I don't put junk in anything!

Ertman

dino oil cokes badly in the K03/K04 turbos

ajg617

Yeah, I've used synthetic in everything I've owned since 1987, exceptions being my Dodge Cummins Turbo Diesel (Cummins says not to use synthetic) and the two Toyota Turbo Supras I had (again Toyota told me not to use synthetic as I was losing a quart in 500 miles just to leaks). The 1.8T has had nothing but synthetic, but the intercooler pipe has trace amounts of oil in it. Just wondering.
Thanks,
Ajg617

Ertman

I always have a very light sheen of oil in the IC tubing. But I very very rarely have to add any oil between changes (5K miles). The last time that I did, it was when I was running some M1 0W40, had to add ~10 oz at 4K miles. I am running Rotella 5w40 syn and never have to add.

ajg617

Thanks. Like to hear those words. I am going to check the oil level to make sure it's not overfull. Last oil change, the top half of the plastic end to the dipstick tube went missing. Had it replaced yesterday so methinks I'll double check the oil level.
regards,
AJG617

Scenic Driver

The oil in the ic piping is from the pcv system. Use a catch can if you want to eliminate it.

Ertman

planing on doing a catch can, just have to figure out the plumbing on an AEB motor

qfrog Ti20

to the catalyst or to the cold side output plumbing?