Can i run 93 octane on 87tow tune

[not you]

Ok so your saying bump the timing up on the 93 tune setting? or bump 87 tow tune and try that . Im guessing you mean the 93 tune ( level 3 ) i can drive with the 93 tune around town? or is it more for highway ? I live in nc (charlotte area) and yes i notice a huge difference with different gas ,I only buy shell or bp but mostly shell get way better mpg on shell. will it do harm with 93octane on 87 tow tune ? thanks for the info Shawn

[Power Hungry]

We always recommend running matching fuel and calibration octane ratings. It doesn't hurt to run higher octane fuel than the program calls for (93 gas in an 87 Tow or Perf. program), but don't recommend the reverse... low octane fuel in a high octane program. Doing so can cause detonation and may ultimately lead to engine failure by way of melted or cracked pistons.

Most of our customers have indicated that for day to day driveability, the 87 Perf. programs work extremely well with 87 octane and provide good response and economy. The biggest difference in the 93 Perf. program is going to be noticeable above 1/2 throttle so unless you are a hot-shoe (like myself...), you won't see any significant difference in normal driving.

Hope this makes sense.

[LTMARK]

I know this thread is old but whatever, So if I drive like grandma I should use the 87 tow tune, and if I run 93 octane I do not need to make any adjustment to my program? Or should I?

[shotgun]

Originally Posted by LTMARK

I know this thread is old but whatever, So if I drive like grandma I should use the 87 tow tune, and if I run 93 octane I do not need to make any adjustment to my program? Or should I?

You've obviously never driven with my Grandma...

If you use 93 octane with your 87 tow tune, you do not have to make any adjustments to the program, but...

You might want to increase your timing to account for the higher octane. As the Dr. states,

The best I can suggest is to try adjusting timing a little bit to see if it perks things up. Add ½ to 1 degree at a time and see if there's any improvement. If there's nothing by 2 degrees, then put it back to stock. Sometimes, even backing timing down a little seems to help. Each vehicle is different and, like fuel variances, there are many factors that can affect performance.

(My 71 year old grandma has lead foot. She recently got a ticket for 79 in a 65. She swears she was only doing 76...)