clear my confusion on Synth Oil and question on coils please...

samedi 14 mars 2015

Hey guys - on my '04 series I i changed the oil regularly, drove the car a little harder than normal (I owned an '85 GLS-SE for 18 yrs before the '04), and the car was still running pretty strong at 120k miles when a kid took my front node off. So I bought an '09 R3 - beautiful and running strong.



So I read about synthetic oil here and there and get totally confused as to whether to use it or not and how long it should last.

So help me clear this up - I can go longer between changes w synthetic - right? At 3000 miles the oil is still pretty clean. Maybe i wont push it to 10k or 15k like on my bimmer - but surely longer than 3,000 miles...?



My other question - I had the engine coils failed on my 04 at 30k, replaced them myself, the other set lasted 100k. On my '09, it appears that based on previous owner records, they had not replaced them so they failed at 95k. I replaced them myself. That's is my worst fear when i go on a long trip and I carry a spare one from my last purchase. SO - when the coils fail again - is there a way to know which one failed? There are no burn marks or visible "wear" - just curious...?



Your help is appreciated




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