87 octane in an 02 ZO6... - Page 2

shakedown067 · 07-05-2011, 10:09 AM

Quote:

Originally Posted by Rich Z

I often wonder what are the chances that the guys driving the tankers put the gasoline into the wrong tanks when they deliver at the stations. Or in some cases regular gasoline is deliberately put into the high test tank so the station owner makes more profit.

You know, I've never thought of that one. I have a few people I can ask and will get back to you. I would hope there would be severe penalties if caught though.

mickeystoysz16 · 07-05-2011, 05:30 PM

If I remember the pumps are calibrated and tested on a regular basis by the department of Agriculture or third party. I am not sure of the frequency but I am sure in that heavily regulated industy they don't let something like that happen especially the gas tax rate is in the 13-15% range. I am sure the govt. does not let anyone mess with their money.

**Rich Z** · 07-05-2011, 06:06 PM

Quote:

Originally Posted by mickeystoysz16

If I remember the pumps are calibrated and tested on a regular basis by the department of Agriculture or third party. I am not sure of the frequency but I am sure in that heavily regulated industy they don't let something like that happen especially the gas tax rate is in the 13-15% range. I am sure the govt. does not let anyone mess with their money.

But do they actually test the octane rating of the gasoline that comes from each pump during the calibration? From what I understand, the pumps are tested to make certain that 1 gallon registered actually delivers 1 gallon and the price per gallon is accurately reflected in the total amount shown.

C6Flatfoot · 07-06-2011, 07:52 AM

I believe that Florida does have inspectors that do spot checks on retailers to ensure that they are pumping premium as advertised. I don't know what penalties they face if they are caught dispensing regular grade from a premium pump and I'm sure that there aren't too many of these state inspectors on the job.

I've been alternating fillups with regular/premium and adding some Lucas lubricant at each fill up. When I bought my "05" with just under 30K miles, the original owner told me he always ran regular in it.

It may be mental, but I think the engine has smoothed out a bit since I've been using the Lucas. I don't let the tank get below 1/2, and I have yet to take a trip. I'm certainly not a fan of ethanol for my cars or my Yamaha outboard.

What kind of additives are you guys using, if any?

shakedown067 · 07-06-2011, 11:31 AM

I only use octane boost before an autocross, and twice a year I use seafoam, 1/2 in the tank, and 1/2 I slowly ingest through the brake booster to clean the injectors and such. The vette (120K+) and truck (220k+) run like a top! I try to use only shell and chevron fuels. They have enough additives already.

mickeystoysz16 · 07-06-2011, 05:37 PM

on the seafoam. I used to have a '72 chevy pickup with a smallblock 350 and Qjet carb. Every year I put a can of seafoam throught the system.

I have never used it on the vette or Silverado though but from what I understand the Seafoam product is supposed to clean out all of the deposits on the valves and pistions that could heat up and cause detonation which is also the reason for the higher octance fuels.

RevXtreme 1 · 07-08-2011, 12:00 PM

The knock sensors level will default to the low octaine tables. You should never here the "ping" as the knock sensors detect and the PCM puls timing faster than we can here it.

If you have been running for any amount of time with the oil ingestion into the intake air charge the amount of carbon buildup on the valve tulips and the piston tops/combustion chamber the PCM will be defaulted to the low octaine tables anyway.

**Rich Z** · 07-08-2011, 12:15 PM

Is there any relatively easy way to tell whether the PCM is using the low octane tables?

RevXtreme 1 · 07-08-2011, 02:36 PM

Just log it and look at the tune.

ZO6Vettever · 07-20-2011, 04:06 PM

Well, I drive "Bad Booger" (firstCorvette was "Booger" this one's "Bad") about 3000-4000 miles a year. At 19 MPG average, preminum will not break the bank. In fact it's about fifty bucks a year so I'm back to the good "Bad Booger Juice". Interesting that it really seemed to not know the differance. I'm a 64 year broke SS dissability income guy. Obama is trying to make things worse. If Booger blew up I couldn't replace him so he drinks the good stuff and I'll drink the cheap whiskey. Thanks for all the insight and I may be old but can still do the stop light drags. God, I love that car!