is mixing different types of gas bad for t fillhe car??

[Koa]

Won't hurt the car... the ecu will compensate, pull timing, and it'll run like poo instead

still not the best remedy for lack of petrol funds, ha

[zkv476]

Manual recommends 93 not 91, 91 is just 'acceptable' and the ECU will just drop the IAM. The tune was meant for 93.

[Koa]

Originally Posted by zkv476

Manual recommends 93 not 91, 91 is just 'acceptable' and the ECU will just drop the IAM. The tune was meant for 93.

I doubt the power decrease from 93 to 91 could be felt or utilised for a disproportionate majority, with only racers (who aren't running corn) and serious petrol heads feeling and being affected by it. Would like to see some hard-pack tests or pointed to interesting studies about this gap.


Gas mileage, however...

[brandonblt2]

Originally Posted by JoonPrime

Hey guys just a quick question.
ive downed about 4000 miles on my car so far and read higher octane *could* help with my cricket noise a bit, as well as being betterfor the car and such.

ive recently gone from the east coast 92 wawa e10 gas to a 93shell. however much to my dismay, my mileage actually went down

i wasnt driving rougher, if anything i drove as careful as possible during my first fill in for shell.

im now thinking of trying out sunoco (shell, wawa, and sunoco are pretty abundant in my area of delaware/pa) should i do anything before fillin her up? is there such a thing as flushing out the car completely of the fluids and starting up fresh?? id like to switch my engine oils and trasmission fluids to motul eventually so i thought id ask ahead of time!

also, if anyones a local... wawa vs sunoco vs shell, which do you use??

I use Wawa (92 oct) and BP (93 oct) I have done plenty of fill ups and used the same driving style and roads and have seen a increase in mpg when using wawa's vs using the BP.

Originally Posted by Fastbrz

You can't even compare Wawa fuel because they get their fuel from the cheapest place possible. It's never consistent. Also, Wawa does not add any additives to the fuel. The only reason Wawa has fuel is to bring customers into the stores. They don't make a dime on fuel. Stay with a quality fuel like v power from shell.

That's not true Wawa does add additives to their fuel, I am pretty sure almost all companies add additives at this point.

[Fastbrz]

Originally Posted by brandonblt2

I use Wawa (92 oct) and BP (93 oct) I have done plenty of fill ups and used the same driving style and roads and have seen a increase in mpg when using wawa's vs using the BP.



That's not true Wawa does add additives to their fuel, I am pretty sure almost all companies add additives at this point.

They say they do but according to my fuel manager they don't.

[brandonblt2]

Originally Posted by Fastbrz

They say they do but according to my fuel manager they don't.

How's he know? Is he at the plant when their adding the fuel to the tankers or does he run a test on the fuel?

[Fastbrz]

Originally Posted by brandonblt2

How's he know? Is he at the plant when their adding the fuel to the tankers or does he run a test on the fuel?

He gets the fuel test report every month.