Winter vs Summer Blend Auto Fuel.

[todehnal]

As most of you know, winter blend auto gas has a different RVP than summer blend. This can be critical in the Rotax 912 ULS engine and can cause vapor lock. Some RV12 pilots have experienced this. Summer blend auto fuel RVP is less susceptible to vapor lock, so I try to stock up a little extra summer blend when I can. I just read that winter blend will begin to roll out on Sept 15 here in Kentucky so I filled my spare 55 gal drum, which gives me close to an extra 15 hours of peace of mind. I do buy ethanol free auto fuel, which I understand has a slightly longer shelf life. You may want to check for the date in your area and stock up a little extra Summer Blend if you can. Just my opinion…. Tom.