when i used to use LRP my plugs would be buggered in just a few hundred K's, they were covered in so much crap it was like i wasn't getting consistant spark... Sometimes i would get a batch of LRP and the car wouldn't rev past 5, it would miss from then on (motors over 100 horsies and is makes max power about 7,000 rpm, and sees it regularly)... Graham Russell who is a top engine builder reckoned BP or i think Mobil, he didn't like Optimax to much either..
I run flashlube as my additive, although the Doring fuel catalysts are quite good, Ive seen the seats of heads of motors running unleaded and one of these catalysts and there fine... They break down the long strain hydrocarbons which damage the seats to shorther strain ones which dont, at no cost to fuel quality... Flashlubes just as good but these are fit and forget, just pipe it in your fuel line after your filter and cable tie it to the bracing near the radiator
Apparently though new fuels have enzymes in them that grow and block everything up, kills the fuel of and has the side effect of making it very murky... Apparently this can happen very quickly in some cases, ie within a few weeks, our fuel situation is crap
could be worse though, could be paying at least twice as much for the same crap fuel in europe
..............I was lucky enough to have a chat with a petrochemical engineer about this the other week who happened to be in the shop (ie Minispares and Repairs, where i work). Only way i know to remedy this, and im sure theres more products and ways, but Doring also has another product, its a ball with some **** metal wrapped around it, you drop it in your tank, forget about it, and over time the metal wrapped around the ball very slowly dissolves, killing these enzymes, as far as i know flashlube doesn't solve this problem, incidentally we stock both the catalysts and "funky balls" at work
I hate sounding like a salesman.... but i do know the doring products work cos we have tested them and use them.... otherwise we wouldn't sell em
Gareth