Back in 2004 I had a bulletin board conversation with someone from Germany. He runs 20,000 kilometer OCIs routinely and said he could go 30,000 km. I asked how is that possible. His response was:
Quote:
…you need three things for a long oil drain interval. If one of these three things is missing, you get gunk.
1.) A good fuel
2.) A proper designed engine
3.) ...Yeah, a good oil
Would you try to do long oil drain interval with a Chevy BelAir '56? No? Yep, you are right, you shouldn't do that.
Going with a good oil and a good engine in a bad fuel country,....
-> Gunk.
…..
I don't want to hurt your feelings.... but the US has compared to Germany horrible fuel…
This is supported by those who run propane fueled engines, as I heard their oil stays very clean for a long time.
Quote:
…you need three things for a long oil drain interval. If one of these three things is missing, you get gunk.
1.) A good fuel
2.) A proper designed engine
3.) ...Yeah, a good oil
Would you try to do long oil drain interval with a Chevy BelAir '56? No? Yep, you are right, you shouldn't do that.
Going with a good oil and a good engine in a bad fuel country,....
-> Gunk.
…..
I don't want to hurt your feelings.... but the US has compared to Germany horrible fuel…
This is supported by those who run propane fueled engines, as I heard their oil stays very clean for a long time.