Hey, I was wondering, does anyone know if BP's new additive, Invigorate, actually do anything? I normally use Shell gasoline, which also recently added a detergent to its gas too. Both companies claim that these new detergents, keep the engine running smoother and burns cleaner. Anyone know about this, or is this just an advertising gimmick? Also, as a side question, what grade of gas do you put in your ralliarts? I put in Regular, but I feel like i'm doing an injustice to the car! Is it true that the higher grades burn cleaner, and keep the car running longer?

 

according to the manufacturer of the car it requires 87 octane unleaded gasoline. no need to use anything else.

 

unless you have mods that require higher rates of gas like piggybacks or timing control boxes like ones from rrm

 

The difference between low octane and high octane ratings is the fuel's ability to burn fast. That's why on turbocharged cars or with high compression they would start to detonate with low octane gasoline. Regarding the engine being clean, etc. every brand will have it's own way of reaching a determined octane rating so it's mostly the additives and detergents that do all the work.

 

The NA reflash I've developed widens the timing curve so you could use 94 octane or 87, however I don't feel it's a good idea to allow a reactive knock control strategy to pull back timing when it hears knock. I suppose I could probably write some more code to allow a switch between high and low octane maps too

An interesting point is that some cars tuned for 87 octane get the best fuel economy on 87 and in many cases produce more power. Reason - the lower octane fuel contains more BTU's of energy per litre (or gallon) and it burns quicker which makes more torque.

Now, in the case of the ralliart, if you check out the stock timing numbers I posted a month or so ago in some regions it is very aggressive. It can take advantage of higher octane fuel. Personally, if I had a RA I'd just run it on mid-grade.

Hope that helps

-Michael

 

The octane rating is a measure of the resistance of gasoline and other fuels to detonation (engine knocking)

That's it.

If a car is tuned for regular gas, then don't put higher test in it. You are wasting money.

Now certain gas companies will mix in their own additives that may or may not help with fuel burning cleaner, cleaning your fuel system, etc.

 

I've been wondering about fuel quality from station to station, too. Check this article out...take it for what it's worth:
http://www.usatoday.com/money/indust...gas-usat_N.htm
Call me paranoid, but I still go the extra 2 minutes out of my way to fill up at the Shell station.

Regarding the fuel grade, I'm in the same boat as hackish. When I was NA, I used mid-grade (89 octane). I did have the ver.2 RRM fuel piggy, but I used mid even before I installed it.

 

another thread about gas?

 

This. Gas is gas, and there are already threads on this.

Closed.