So I’ve been busy and haven’t been around the forums lately, but for the last month and a half or so I have had horrible issues with knock. I had to pull 7-8 degrees of timing in some areas and I’m still seeing it. This is on a tune that has rarely pulled more then a degree in the past. My system for pulling timing is a bit agressive so it’s not a fair comparison tune to tune but I’ve seen some knock events pull down to -5 or -6. After I pulled out a lot of timing it’s much better. I don’t believe it to be an engine problem as the knock events happen randomly in all four cylinders. All the evidence points to bad gas. I’ve tried many different stations and actually found a little better gas at a couple small no name stations.
i was looking into it and found out that California reformulated it’s gasoline for better emissions in July, around the same time I started having problems. I’d like to know if anyone else noticed this. If so there is something wrong with their formula and we need to speak up. Octane is knock resistance and the rating scale should be apples to apples From formulation to formulation. If they screwed this up then they can’t label something with the knock resistance of 87 as 91. I have a feeling California has been doing this for some time as most peoplefeel Ca gas is not as knock resistant as someother states at the same octane level to begin with. I’m not sure who to contact if we find evidence of this but it sure seems unethical. If I’m paying that much for 91 octane I should be getting 91 octane.
i was looking into it and found out that California reformulated it’s gasoline for better emissions in July, around the same time I started having problems. I’d like to know if anyone else noticed this. If so there is something wrong with their formula and we need to speak up. Octane is knock resistance and the rating scale should be apples to apples From formulation to formulation. If they screwed this up then they can’t label something with the knock resistance of 87 as 91. I have a feeling California has been doing this for some time as most peoplefeel Ca gas is not as knock resistant as someother states at the same octane level to begin with. I’m not sure who to contact if we find evidence of this but it sure seems unethical. If I’m paying that much for 91 octane I should be getting 91 octane.