....does using top tier gas mean I can easily run 87 octane in my 98 deville? I havent tryyed it but I wanted to get some feedback on it. Where I live I do have shell stations, some Chevron`s but thats it from the top tier list. thanks.
There's a year crossover for recommended N* octane requirements. The N* PCM "listens" to a pretty sensitive knock sensor, so you would probably be OK with 87 for normal driving, but not towing or extended mountain climbing.
Do a google for "top tier, techron, gasoline". Settle in for a long session.
Just as an aside, the google reads on top tier fuels will make specific mention of Chevron's TECHRON additive, which is now licensed to a lot of national and local fuel blenders. (BP is recommended by Ford, but is not a top tier fuel...)
AutoBarn, in your area, sells 20 oz. bottles of TECHRON for around $8. Quite expensive for a one-time shot, but that's all that's recommended every 3-4,000 miles. West Marine also sells the stuff. It's magic in a marine engine.
Yes, I know BP is not top tier but its 6 cents off umitimate today. As far as top tier stations are concerned, I went to the top tier web page, they list shell & chevron...Those are the only two in my area. I will definitely try shell probably in a couple days. thanks:lildevil:
BP+Chevron Techron=Top Tier. The base stocks of all common brand name gasolines come from the same refineries, are the same, and they all contain a small amount of system cleaners by EPA regulation. Top Tier gasolines contain additional system cleaners above and beyond that required by regulation. Add the cleaners to the cheaper gas yourself.
Right on Binkey!! I'm believing that engine deposits have been grossly ignored, at least there's been little coordination between the fuel producer guys and the engine building guys. Cleaner engines run cleaner. K_C
the difference is about 4-6 dollars a tank at most...
if you buy a bottle of "additive" to add to your 87 you should have just hit the button for 93 while you were at the pump because you just paid more...
I run exclusively 93 octane in mine unless i am bottom of the barrel broke in which case i cut out a mcdonalds meal and still fill with 93...or i slip in about 5-10 bucks of 87 to carry me to my bi-weekly paycheck so i can grab a bottle of techron and refill with 93...
coincidentally i have no fuel system or performance issues...
i also notice a difference between running on 87 and 93...a little with the 93+tech mix but not so much...
TECHRON is not any form of an octane booster or all-purpose fuel system additive. It is an engine deposit cleaner blended into some gasolines, in microscopic amounts - parts per million.
The 20 oz. bottle says to use that much of a slug only once every several thousand miles.
Google the "top tier" sites and figure out what the stuff really is.
this much i know...but thanks for restating the obvious...
i have been using it recently to help clean out 110k miles of gunk...2 bottles in the first tank (cause it only treats 12 gallons, caddy is 18+) and 1 bottle in each of the 3 sucessive tanks...then im done...
even if i were looking for an octane booster...i don't think "104+" even is as powerful as it used to be...i wouldnt even bother. if i were serious abotu needing anything mroe than 93 i'd buy a 55gal drum of 110 and blend my own...
:annoyed:I doubt if I add that techron stuff. I may mix premium with 87 or 89 and see how she runs with it. I doubt if I run straight 87, obviously the car is intended to use at least 91 octane .
octane boosters don't work... They state on the bottle +5 points octane or some such.... What they don't tell you is one point = 0.1 octane
So dumping a bottle in a tank of 87 will give you 87.5 octane
I highly recommend top tier fuels, or at least using techron or one of the other additives... They do work, and there are tests out there that prove it.
Damage? What damage? I ran my '97 on 87 on the advice of the Guru for 3 years before selling it at 107K 2 years ago. My neighbor is still driving it. You WILL NOT do any damage by running 87. I would never tell anyone to do that if it were possible to damage the engine.
Theoretically that should be true. FWIW, when I switched, I noticed no change in mileage. Seat of the pants dyno detected no change , though admittedly there should be some if it was accurately measured on a dyno.
You can still go WOT and probably won't notice the difference. Try it and you be the judge. Won't do any harm and you can always switch back. Let us know what you think.
OK..I put 87 from BP today. So far, theres no noticeable difference. there was about 4 gallons in the tank of 93 still though. I will get more 87 next fill.
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