gerhard

Hi folks,

Just a quick question: Do all variants of the RSX require premium / super gas (aka 90+ octane fuel)?

I know this a noob question, but the answer is not forth coming on many sites (and I need to get back to work).

Gerhard

20ls01

base rsx- octane 87. anything higher is a waste of money and may actually decrease gas mileage
rsx-s- octane 91 is a must. anything lower will decrease gas mileage, loss of power and possibly cause knocking. however, the ecu can adjust to lower octane but i wouldnt recommend using it. the manual says 91 is a must anyways


Modified by 20ls01 at 4:07 PM 3/6/2007

Rev4Ever

Since the type-s is the best model I put PREMIUM gas. I agree about the better gas milage and also why not for the peace of mind.

gerhard

Interesting...

So the base model with 9.8:1 compression ratio uses regular... I'm somewhat suprised as the H22A4 in my old Prelude required super at 10:1.

Anyway, good to know that only the type-S requires 91 or better...

Oh, and by the way: I know for fact that repeated use of non-91 octane or better fuel in any Honda that "requires" is will eventually damage the rings.

Thanks guys!

Gerhard

inkong

exactly why you should use 91+ if you want to insure the life of your engine and have to desired power ... fuel octane makes a tad bit of a difference in power ... plus it runs cleaner in your engine using higher octane ... its not as watered down

chrisguyver

so if i use 91+ gas on my base automatic will that ruin the engin.

inkong

no it wouldnt ... 91 would work better for your car ... no matter what it is ...

Rev4Ever

I agree, it won't harm your motor to put premuim. If I were you I'd put the middle grade on your base RSX, but it's up to you since the price different we're talking about is like $5 max.

eMpAtHy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gerhard &raquo;</TD></TR><TR><TD CLASS="quote">Interesting...

So the base model with 9.8:1 compression ratio uses regular... I'm somewhat suprised as the H22A4 in my old Prelude required super at 10:1.

Anyway, good to know that only the type-S requires 91 or better...

Oh, and by the way: I know for fact that repeated use of non-91 octane or better fuel in any Honda that "requires" is will eventually damage the rings.

Thanks guys!

Gerhard
</TD></TR></TABLE>

the K series doesn't have the infamous ring land issues that the H series did. Using 87 octane wont destroy your engine as our ECU's are able to sense that the timings need to be retarded in order to prevent engine knock.

Compression isnt the only factor that constitutes which octane an engine requires. There are many other factors such as timing.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by inkong &raquo;</TD></TR><TR><TD CLASS="quote">no it wouldnt ... 91 would work better for your car ... no matter what it is ... </TD></TR></TABLE>

It wont benefit in any way unless there are different additives between each octane. The base model was made to run on 87 octane. The ECU wont go ahead and advance timings if it realizes that it's running on 91 octane instead of 87.

Save your money and use 87.

gerhard

Just to reitterate it:

There is nothing wrong with using premium in a car that says it requires regular (87 Octane) to operate.

There have been issues with certain engines that indicate they require super / premium (90+ octane) fuel and long term use of regular. Notably, the rings will begin to wear and the car will begin to burn oil, while, oddly, maintaining a decent compression ratio.

So, using super in a car designed for regular will not hurt the engine. The only bebefit you might see is that the detergents in certain brands of super may help your valves and cylinders stay cleaner...

Aco512

i would just stick to what the manual says
regular for the base models
premium for the type-s
if base model is f/i, then use premium

Rev4Ever

Rev4Ever will be Premium4Life

unpaidbill

I use 87 in my base, but if I move up to mid-grade (89 around here) my mileage seems to improve just a bit.

Aco512

i don't think its worth putting a higher grade in the a3
i would stick with the low grade
doubt it really helps your gas milage at all
driving habits, temp, etc.... can change your gas milage
unless your boostin or have internal upgrades