Join Date: Jul 2008
Location: Lynnwood, WA, USA
The interesting mention of turbine applications. I still regret not looking under the oil cap of our V70 T5 before we bought it. Even there, there was evidence of coked up oil. Luckily for us, the only issue that became apparent down the road, other than leaks, was a plugged up breather system. I can only assume that the original owner of the car used conventional oil for those first 40k. After our ownership for the next 100k and synthetic oils, there was no further build up on parts that I could inspect. I would have enjoyed dropping the oil pan, but that would have required dropping the subframe also.
Yeah, I have an addiction to small displacement, turbo motors. So, it is just easier to keep synthetic on the shelf, esp with a WalMart just up the road.
My guess, given the observed coolant temps of my ST, the motor does not run as hot as car motors, esp HP turbos and very lean mixtures. But, seeing zero evidence of coked up oil was a nice, warm fuzzy when in the past I pulled the vert head and right engine cover.
Now on the Ural, some folks will say to run conventional to speed along the break in process. Myself, I'm happy to let that take as long as it wants to, with synthetic. The bike has a low pressures oil system with splash lubrication, esp to the heads. It is a truly air-cooled bike. I'm not going there with a non-synthetic oil. =)
Have a good one.
2001 ST4 - Thumper
2013 Ural GearUp (sold)