I can second the use of Techron! Makes a big difference on my Probe GT's V-6. It's the recommended solution on the Probe for cleaning up carbon deposits in the cylinders. Very good stuff!! Get the concentrate and follow the directions. If you have access to Chevron gas, just buy their Premium all the time and it will do the same thing. Chevron isn't available where I live, so I get the add-in. Mark N VIN 6820 At 07:25 AM 8/24/99 -0400, you wrote: >We've used Techron several times in my wife's Accord, and in the D. Seems to >work good for us. I like to add it when there's only 2 or 3 gallons left in >the tank and drive it till almost empty, so it's really concentrated.