Wheelman: Stop using premium. You will get more power from regular and also save about $0.20 per gallon. Trust me .... or search for my other posts on this topic for more info.

 

Plus premium probably gets you worse gas mileage. It may even harm the engine since your engine was made to run off of regular.

 

Nah, it won't hurt anything .... maybe shorten the life of the cat from more fuel burning off on it.

 

I've seen it give a bit of a ping in some cars too....

 

Cat's aren't cheap either......

 

you have to feed them and get them shots and stuff ..... then there are the hairballs in your slippers .....

 

I found in my 2006 ford focus, that I got better fuel mileage when I was at 120KM/H ( I had no tack in the car so I dont know my RPM, roughly 3250 I would think). And in my '91 accord I find that I get better fuel mileage when I travel at 110KM/H(roughly 2500RPM) then when I travel at even 80KM/H(roughly 3300RPM).

 

yea lx5sp is right,

i could buy a JDM H22 for the price that a cat costs. (not the animal)

 

Today I added some Prestone injector cleaner, filled up the tank, and headed out of the city. I covered a total of approx. 150 miles and the fuel gauge is still a tad above 3/4's full!!. About 20 of the 150 miles was very steep,hilly terrain. I tried to maintain an average speed of 80km/h most of the time. I'm truly impressed!..extrapolating from this, under similiar conditions, i should be able to get close to 600 mph!!!

 

That's 600mpg of course