Good information here..

Some engines also have heads made of special alloys or ceramics and these engines tend to last a good 10-15 gallons.

Only thing is, it takes about a gallon to break in in all the way!

I started full throttling my HPI at about 6 tanks. That thing really screamed, but I could tell it still needed to break in some more to pull out the revvs!

Dont forget.. temperature changes a lot depending on what engine it is your talking about.

Most RTR engines run well around 235-250.
But you can run the ceramic engines at that temp only after a few tanks!

And I was talking to a friend, he told me that runs his engine at 275 and runs in the 300s often while racing.. and it lasts em over 10 gallons!

Of course.. ya gotta pay $350-400 to get an engine like that. Ouch! lol

ram