Originally Posted by
Myopic
Since I've already asked you about the type of engine oil, I'll also ask what kind of petrol you use in your Crossfires?
I initially filled up with 95 petrol, because that's what the previous owner filled up with, and that's what the owner's manual recommends.
But then I read that it's better to fill up with 98 petrol for powerful engines in sports cars, and I'm currently using 98 petrol.
Most of us Americans have no clue about what you are asking. I say this because it is my understanding that ratings of gasoline are different over there and our "91 octane" gasoline works out to be your "95 RON" petrol.
Over here, our owner's manuals say "premium fuel only", to be clear, the manual says: "octane of 91 or higher"
Our stations only sell 90 to 93 as "premium" with octane of 89 or a bit less being "Midgrade" and numbers of 85 or so being "regular". In my area, 90 is all I can get.
I run 90 but I also buy
100% gasoline, even in the metro area, just one mile from me, I can buy 90 octane,
ethanol-free gas and that is what I run. In my case, this is very important as my car sits a LOT and ethanol is the last thing I want in it if it is going to sit a lot.
The last topic is the oil filter - are you using a paper filter? If so, I'd never buy the car from you. The paper filters crush, allowing unfiltered oil to pass - worst than that, the paper can break free and clog passages. It is of paramount importance to use the fleece filter, they stand up to 80 psi and 220 degree F for THOUSANDS of miles without compromising. My car had a paper filter in it when I brought it home, 1000 miles on it and it had collapsed. I changed the filter and oil right away. I wish I still had a picture of that filter...........