BobN54

Pinging (aka knocking) is not pre-ignition. It is detonation. Two different phenomena. Detonation is the result of abnormal combustion after the spark. Pre-ignition is the ignition of the mixture before the spark occurs. Pre-ignition is seriously destructive.

fixmiester

You are correct; I am guilty of using terms that, although familiar, were not totally accurate. This thread definitely has nine lives. Long live the forum.

JRF

Hi,

I have not read then entire thread so sorry if this has been asked before. Question is that I can buy ethanol free gas close by from a distributor. Problem is its only 90 octane and is raw gas with no additives.

Last year I drove cross country and blundered in a gas station in Sweetwater Texas with ethanol free gas. From San Diego to Sweetwater I averaged right at 25 mpg at 85 mph. After filling up from 1/4 full in Sweetwater I got right at 28mpg at 85 mph.

My question is if the 90 octane is OK and if I need to buy some type of additive to add when I fill up. I only drive about 600 miles a month.

Thanks,

John

PS My car is a 2000 LS 400 with 91k miles

Lavrishevo

iTrader: (1)

I can only get 91 octane now in PR. I don't see why 90 would be a problem. I would run a bottle of the Lucas Oil fuel treatment every 2 -3 tanks. Much more effective then the standard additive in most gas. I'm a big fan of their products. I run a bottle though mine every 3 tanks or so myself.

PureDrifter

iTrader: (10)

"raw gas" is actually not sold at any gas station in the country, for quite some time gasoline has had required detergents and additives mandated by the federal government.

the increased fuel mileage you saw was probably a direct result of the decreased ethanol content, as ethanol contains less energy than gasoline does.

Lavrishevo

iTrader: (1)

But requires more energy and increases global pollution to manufacture. It is such a joke.

mike171333

check this website
http://pure-gas.org/index.jsp?stateprov=MO

JRF

I figured that the lack of ethanol was the reason for the increased gas mileage. That is why I want to start using it. It's the 90 octane that bothers me. Btw, this isn't a gas station. It's a distributor that sells to gas stations. The lady I spoke with said it had no additives. Maybe she misunderstood what I was asking. I will call them again.

http://www.sawhite.com/

JRF

I use 93 octane here in Atlanta since I can buy it but in San Diego the best I could get was on 91 and it ran fine. Thanks.

Lavrishevo

iTrader: (1)

How much a gallon would it cost for you to buy fuel from them? I assume you have or are going to put a small tank of your property. Another option is to buy in or the packs of the additive from Costco. Personally, I can feel the difference in power with the Lucas product, which is why I recommend them over the many other crappy products out there. Again, most of the country is only running 91 so you running 90 and then mixing in your own additive would be better then what is out there. The Lucas stuff is fantastic.

JRF

She quoted $4.35 a gallon. I was not going to put a tank on any property. This place sells to the public. Thanks for the reply

Lavrishevo

iTrader: (1)

$4.35 Average price in GA is only $3.85 At that price it is not worth it. In PR, I pay $1.05 a liter right now or right at $4.00 a gallon for 91.

j2b4o

Lucas makes snake oil and nothing else...
Check out bobistheoilguy if you want to delve further into the subject.

LS4001UZPW

All the local gas stations near me has 91 the highest. There is only one in town which has 94 but is ethanol free.

I was wondering if I can switch between 94 and 91 because 94 is a bit too much. Just wondering if mixing ethanol free gas ans ethanol gas will cause any issues? Usually when I fill with 91, I always add a bottle of octane booster.

JRF

It wouldn't cause any issues. It would just dilute the % of ethanol in the mix. I would run the 94 corn free alone if I could get it.

John