attzor

iTrader: (1)

I had my headgasket replaced with a 1.4mm HG a few weeks ago and just started driving it today, has anyone else tried this? The car feels quite a bit slower, but seems to be getting way better mpg. And since the compression is lowered, 87 octane should be useable, right? any thoughts/experiences?

SC300_704

iTrader: (5)

i'm running the 1.3mm HG but i only use 93 octane.

imDementeD

iTrader: (7)

87 is usable on stock comp. just not suggested..but yes with probably 9:1cr now it wont have any problems on 87...and typically people dont do this unless they plan to boost later on for the obvious reason of loss of power.

attzor

iTrader: (1)

I do plan on boosting the car, I have most of the parts already, just need a few more. The MPG seems to be better than before, or its just going from the truck I was driving to this.

1WILLY1

iTrader: (9)

how bad is it really to use 87 octane with the stock 1uz?

To be honest i use 89 most of the time and i dont have any issues at all.

I know i should be using 91 or higher.

Please let me know.

imDementeD

iTrader: (7)

really its not going to hurt the motor because it has a knock sensor ..and it'll adjust accordingly if any detonation begins to take place..
the only downside is that its possible to get bad gas..then you might run into some issues..

however ive been running 87 for a little while on my 2jz-ge since money has been down lately and gas went up a good bit in the last month or so..no issues so far

nivek5sfe

i put a tt gasket on my car in preparation for boost and have been driving it NA for the past 4 months. dont see why it would harm it.

attzor

iTrader: (1)

I only fill up at QT so bad gas will never be an issue.

ElitistK

iTrader: (4)

lower compression actually means worst mpg, not better.

the only advantage is that you can run 87 without much knock/pinging from the engine under heavy load.

N00bie909

iTrader: (5)

Sorry to thread jack...I'm also about to buy a hks head gasket 2.0mm one since I want to boost sumtime next year but will it damage the motor running a biggr hg of that size?

imDementeD

iTrader: (7)

^ no
(10char)

greyBLITZ

iTrader: (2)

Thicker won't damage, but thinner could.

1WILLY1

iTrader: (9)

guys forgive my ignorance but what is NA.

and to sum it up is it safe to run 87 octane gas yes or no---my mechanic says it should be fine but i still only run 89 or 91 anyways.

thanks

imDementeD

iTrader: (7)

^ its safe yes. na = natural aspiration ie no forced induction(turbo,supercharger)

good2go

iTrader: (6)

NA = Naturally Aspirated (or Normally Aspirated if you prefer)

as opposed to any form of FI, or Forced Induction (ie. turbo, blower, etc.)

IMHO, you should always put the proper gas in the engine. If a person can't afford the difference between regular and premium, then maybe they shouldn't have the car in the first place.