Anyone know the best brand or can recommend a specific brand for the XK?!

 

Sta-Bill......



Hope this helps......

 

They're pretty much redundant on modern (1970s and newer) cars. Fuel spoils primarily when exposed to moisture. Our cars have very tightly sealed systems that provide no path for moisture to enter when the engine is shut off.

Does no harm to use them, so brand is irrelevant.

 

Old school said that fuel had a shelf life of about three months. My brother-in-law is a scientist with Shell Canada. He says that present day fuel will last about a year before it's elements start to break down, regardless of grade.

 

I added 3/4 of a tank of non alcohol gas; sleep a lot easier now! Have about 2 oz's of StaBil for other quarter.
Sometimes small amount of water present from gas station............so use StaBil for E10 Gas storage.

Cheers, Adrian