EXUP Petrol

oldskoolexup · Post by **oldskoolexup** » Wed Jun 16, 2021 12:50 pm

According to the GOV website, "All Yamaha models from Model Year 1990 are compatible with E10" fuel.........Has anyone had any issues with E5 fuels or are you using super unleaded?????

jcr · Post by **jcr** » Wed Jun 16, 2021 7:10 pm

i just put standard unleaded in my Thunderace. i will put premium in if im not going to be using the bike for a while, as i understand it keeps better.

Post by **Stig** » Wed Jun 16, 2021 9:37 pm

Always ran mine on regular unleaded. No issues ( if it ever gets used)

Post by **nugget** » Wed Jun 16, 2021 9:54 pm

I use regular unleaded, but I do fill the tank up twice within the biking season with shell V power.

Goshreally2 · Post by **Goshreally2** » Thu Jun 17, 2021 12:51 am

I was looking at fuel octane ratings a while back. In the manual I have (yes it is a Haynes ) it states fuel grade for all years UK bikes was regular and 1989 on US was unleaded ( The service info. manual from this site also states that for my bike - genesis). Taking regular to mean old 4 star I found that the minimum octane was 97 but was usually 98. Standard unleaded is 95. What with higher octane being more resistant to pre ignition it made sense for me to use super as it is minimum 97. For "the" answer to your question I would look at the service info from here and see what it says, regular or unleaded, that should tell you which one is closer to the fuel it was designed to run on.

Goshreally2 · Post by **Goshreally2** » Thu Jun 17, 2021 1:10 am

Sorry, I posted before realizing what you meant regarding the new fuel grade. For my bike (87 ) I have found that I need to use E5. I was told that the added renewable source ethanol in E10 does not make it really any different to standard unleaded. So if the info for your bike says unleaded, E10 should be ok.

YAMAEXUP · Post by **YAMAEXUP** » Thu Jun 17, 2021 4:32 pm

There's been a big debate on many forums about E5 & E10. I've been using super unleaded in my R1 & Exup for many years after riding in frogland & experiencing cr@p petrol. The ordinary unleaded caused the engine to run badly so I tried the super & there was an immediate difference. In my mind it's worth the extra few pennies to keep our engines running as they should.

At my local Esso garage yesterday the E5 sticker on the super trigger said 98 Ron, whereas the E10 ordinary said 95 Ron. The local Shell garage says their super was 97 Ron.