just bought a 1999 2L mitsi galant, and the previous owner said it needs to run on 95 octane. Is there any reason i cant run it on 91.
unbeatabull,
Sep 16, 12:19am
It'll be cheaper to run on 95.
kevymtnz,
Sep 16, 12:24am
its 93 and 97 to be more closer if compression ratio is not over 10/1 use the lower that being 93
lazzo,
Sep 16, 12:33am
Yes 95+ octane is correct.
unbeatabull,
Sep 16, 12:34am
No . They can differ I think the percentage was 3 octane either side! So could be as low as 88 or as high as 98. Longer its been sitting in the tanks underground the lower it'll be.
m16d,
Sep 16, 1:55am
It'll ping on 91.
therafter1,
Sep 16, 2:12am
If it is carburetted then yes, but I can't see one of those being carbed so would imagine that it should run fine on 91
a.woodrow,
Sep 16, 2:15am
If it is the GDI motor you definately want to run it on high octane
therafter1,
Sep 16, 2:29am
True, if imported 99% chance GDI . NZ new won't be GDI.
lazzo,
Sep 16, 2:44am
OP has stated it is a 2.0L engine which suggests it is NZ New 2.0 MPI. The import GDI engines in Galant were 1.8L or 2.4L.
All Galants regardless of NZ New or import should be run on 95+ octane.
bevharris1938,
Sep 16, 5:08am
91 gas is for lawnmowers and weed eaters
a.woodrow,
Sep 16, 5:16am
Yep I know what size OP said, but a lot of the time people don't know the correct engine size. 2.4L to some is 2L to others, some people round up 1.8 etc etc
franc123,
Sep 16, 7:26am
Gotta love the octane snobs on here who seem to enjoy boosting oil company profits. 91 will be fine I'm sure.
unbeatabull,
Sep 16, 7:43am
Margins are the same between 91 and 95. I think only BP have a slightly bigger margin profit on their 98 Ultimate over 91.
neo_psy,
Sep 16, 7:51am
We've had a 98 and now an 05 Nz new galant (2l model). Tested it on a full tank of both and definitely cheaper to run on 95.
phillip.weston,
Sep 16, 10:01pm
The 1999 onwards jap import GDI Galants had the 2.0L 4G94 instead of the 1.8 4G93 the earlier models had.
The owners manual from my 2000 NZ-new Galant 2.0 states that 91 octane is recommended, while the V6 requires 95 octane.
gmphil,
Sep 16, 10:16pm
Confused now!Thistopic has bein thrashed but still every second thread contradick the other lol wot does my sister run her 99 import galant 4G94 on !91,95,98!
intrade,
Sep 16, 10:35pm
here is how i do it . you run a tank on low octane and see if it pinks or knocks worst fuel was shell for pinking on low octane when i had a petrol car so avoided that and used caltex or gull, then you make a record how far you get with the fuel per 100km traveled distance , then you fill it with highest octane and do the same again , and usually i found on higher octane the car used far less fuel for the distance . so the saving per liter from higher to lower octane was less then when i pay more for the higher octane and travel further and use less= high octane runs the car cheaper moneywise then the lower octane where i used over 1 liter more to travel 100km
intrade,
Sep 16, 10:39pm
ifa engine pinks or nocks in any way or form then you should use higher octane fuel soonest. as the knocking destroys your engine and it wont be long before it looses more and more power till a rod pokes out the side of the block when it has knocked enough.
phillip.weston,
Sep 17, 12:03am
95 or 98, with 98 preferred.
smac,
Sep 17, 12:19am
The problem people have with testing between different fuels is they test on 1 tank or even half a tank and think they have the answer. I imagine it varies between engines but they definitely take some k's to adjust properly.
If the engine and ecu are designed to take advantage of higher octane, the engine WILL use less fuel on the higher octane fuel. The only question is whether or not it is financially worthwhile because of the price jump.
Irrelevant question if you have an engine that REQUIRES the higher rating.
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