87 tune with 89 octane

swtz71 · Oct 17, 2011

I am sorry if this was covered but i have an octane question.
I got an87 tune and was wondering if I used 89 octane if that would increase power or mpg or if it is useless.

Just curious to know,cause I know if you use 89 with a 93 tune it is not good.
just wanted to know if I went up in octane i would benefit.

Thanks

JennaBear · Oct 19, 2011

Shoot an email to [email protected] to have Justin look at your file. He will be able to determine whether or not it would benefit from 89.

swtz71 · Oct 20, 2011

Thanks I sent one out..

My01yuk · Oct 21, 2011

swtz71 said:
Thanks I sent one out..

Please post the response. I got the 87 tune in May and i am now on my second tank of 89 octane. Would like to know if there will be much gains. Last tank was about a wash between using 87 vs 89, 13.5 MPG mostly city. I figure give it at least 2-3 tanks to see if my tank stretches further with 89.

swtz71 · Oct 21, 2011

as soon as I hear back I will post up what he says.

swtz71 · Oct 24, 2011

Well I heard back from Justin, he said that 89 octane should increase performance and to give it a shot and see what I think.
So I am going to run my tank down and fill with 89.

my01yuk, have you had any increase?

My01yuk · Oct 28, 2011

swtz71 said:
Well I heard back from Justin, he said that 89 octane should increase performance and to give it a shot and see what I think.
So I am going to run my tank down and fill with 89.

my01yuk, have you had any increase?

Swtz,

This is my second tank, i will hold off on going as far as saying i have seen an increase. This tank seems to be a tad bit better than my three previous tanks. As far as power, I had to pass a sunday driver this morning on a two lane hwy. I got around him in no time, i went from 55 to 75 in a flash. With big ass 22's she just got up and went. Felt good. I think 89 will be my octane of choice going forward.

swtz71 · Oct 30, 2011

and it's only a 10 cent difference I am on my second tank and there is a difference..

JennaBear · Oct 30, 2011

Higher octane (provided it is good quality) will typically yield better MPG results.

My01yuk · Nov 2, 2011

Filled up on friday. avg 13.85 with my third tank and that was 98% city driving. I am happy with using 89 so far, can't see my going back. I used the hand/calculator method when figuring out my mpg. my 01 doesn't have the DIC. So I'm pretty confident that my avg is correct.

My01yuk · Nov 11, 2011

well i filled up this morning, two weeks after my last fill up. working from home really helps. I avgd 14.18 with the last tank and it was about 98% city driving. It's going up with each tank, hopefully it will peak at at 14.5 or better. I paid exactly $3 more using 89 over 87. Took a little over 19 gl to fill up so i still had about 6 gls left.

swtz71 · Nov 11, 2011

nice!!... I am on my second tank now and about to fill tomorrow... Definitely better..

87 tune with 89 octane

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