Volvo Gxi / Fuel Octane ?

[Maps]

I have a Volvo 5.0 Gxi , They say to use 89 fuel octane and up but since I cannot find higher octane level in my local marinas , what would 87 fuel octane do on the engine in the long run ?

[Coors]

Nothing; retard the timing 1 degree, or power tune; does it have a spark knock? what year/

[Don S]

It's an MPI engine, and there is no way to reset the timing. The ECM does all that.
No harm will come to your engine using 87 octane, you will just loose a little bit of power.
Here is some more info from the owners manual of a GXI.

Gasoline recommendations
USE ONLY UNLEADED FUEL. Maximum engine performance
requires the use of lead-free gasoline with the following
minimum or higher octane specification:
Inside the U.S.: (R+M)/2 (AKI) – 89
Outside the U.S.: (RON) – 93
If fuels with 89 AKI pump posted (93 RON) octane number or
higher are not available, lower octane fuels (minimum 87 AKI
[90 RON] octane) can be used. With the use of lower octane fuel, a slight decrease in power can be expected.
Premium fuel contains injector cleaners and other additives that protect the fuel system and provide optimum performance.
Volvo Penta strongly recommends the use of premium grade
fuels.

[Maps]

So I guess using 87 octane fuel in a multiport volvo engine wont cause any harm

Thanks for the info

[bruceb58]

These days all the grades of gasoline have injector cleaners in them. Just use the regular...not worth the extra money for the premium.