What do plugs tell you?
#1
#5
For me, it looks a bit black with carbon. It should be brown, IMO. Could drop a number (go one hotter) on the plugs and see how it turns out.
#6
I thought that too and I was having an issue with a slight knock at high speed and seafoam didn't do much so I increased the gas octane rating and it went away. The owners manual says the ideal gas is 91 octane with 87 as the lowest so I'm guessing decades of cheap gas left a legacy for me to fix. I'll waterboard the car this weekend and see what come out the tailpipe. Then maybe I can go back to regular gas.
BTW I run my antique 289 Mustang on 25% race gas (110 octane w/ 4 grams lead) which really works well and even at $10 a gallon is still fraction the price of the one pint additives, but I understand the lead would kill the cat in new cars.
BTW I run my antique 289 Mustang on 25% race gas (110 octane w/ 4 grams lead) which really works well and even at $10 a gallon is still fraction the price of the one pint additives, but I understand the lead would kill the cat in new cars.
#7
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