Hello everyone I have a DVX400 and everynow and then when I ride it sounds like the engine is pinging I'm wondering if it woudent hurt to run like 93 octane fuel instead of 86 if you guy could give me some info it would help alot. oh ya the bike is stock and i just had it serviced for the first time they said everything loked great the valves were also adjusted.

 

Premium is a waste on a stock kawisukicat. If your bike is actually pinging on regular and you arent running in extreme heat then you have a problem with the bike, not your gasoline.

 

I'm amazed that anyone would use anything but Premium in an engine with a 11.3:1 compression ratio!! Over 10:1 usually requires Premium, even late model auto engines with sophisticated computer controls and knock sensors!

The Suzuki Z400 Shop Manual specifies: "91 octane or higher rated by the Research Method"!

Premium fuel is not 'wasted'! If operating conditions periodically require it, it is there. The slight extra cost is not even a consideration when weighed against the possible severe engine damage that could result from not using it! Since your engine is pinging, it obviously needs Premium.


PS: Always add StaBil to your gas to prevent fuel deterioration. Cheap insurance!

 

I run 92 octane every other tank of gas in my 650V2