ive noticed over the past couple of months that my car pings once in awhile at full throttle in the higher rpms 4-6.5k. even when i dynoed my car a couple weeks ago it was pinging on the dyno. i wonder if thats why my #'s was kinda low. but ive always used 91 octane gas. so i tried the lucas octane booster/fuel treatment in a full tank of gas with 91 oct and i havent noticed any pinging what so ever. could it be that gas companies are cheating us on the gas ratings?

 

well i mean the car's 6 years old, it is possible that the injectors may have been gunked up a little or something, thus why the fuel treatment helped out. Octane boosters have been proven to only add between .5 and like 3 i think points on octane ratings, there's a thread on here about it i believe.

i didnt have any pinging but my injectors were getting a little noisy and my mileage wasnt so good, so once i put in the lucas fuel treatment it lubed up/quieted the injectors right down and i saw a 1-2mpg increase. Btw, this is using 89 octane gas with no octane booster, but i have a 2jz. If i was running a 1uz or 3uz (like you are) id probably spring for the 91.

I know in my father's ls430 he puts 89 octane in it and the idle isnt very stable, regardless of the VVTi. I had it for a week, put in 91 octane and it ran smooth as ever.

i dont know if i'd say its based upon the gas you're buying but i really think it was probably just gunked up injectors or something to that effect. Also check your spark plugs if you haven't done that recently, that could cause a problem.

 

When was the last time you changed your plugs? Are you sure it's pinging and not a misfire?

If you have old plugs that aren't firing well you will have a very light hesitation pop in and out in the upper rpm range (the area you are have issues). Octane booster has *almost* no effect on the octane rating, as stated before it only raises the rating less than half a point, it's really more of a gimmick.

 

You will need to add a lot of octane booster to actually get your octane up significantly. Once you factor in the cost of the octane booster, you would be better off buying race gas.

 

maybe thats all it needed was the fuel treatment for the injectors. cause my mileage was an average 19.2-20.1mpg now its been reading 20.4-22.1 mpg. and i havent heard any noise that resembled pinging at all.

 

so your getting 20+ mpg on a 2002 gs430 WITH 22" rims? yeah thats not happening.....highly unlikely its possible...unless your talking about highway miles and with 22"s its still not likely! n yea i saw u sold the 1st 22's but u said u had ordered or were ordering some more so i assume this what your riding on?

 

Clean your MAF and change your air filter. Just don't use those K&N filters. They tend to clogs the MAF. GL!