There is some confusion as to how the ASTM process compares to Supplemental Type Certificate (STC) approval for the unleaded fuels that will replace 100LL. Some people even think that they are basically the same. In reality they are very different and most of that difference goes back to our old friend liability.
Can I mix different brands of oil in my aircraft’s engine?
While conventional wisdom says you shouldn’t mix different brands of oil in your aircraft engine, our expert says otherwise.
Are two grades of fuel needed in the quest for unleaded avgas?
The most common suggestion I have received concerning the future of unleaded avgas is that there is a need for two grades of fuels, not just one.
Birds of a feather
One of the most common questions our oils expert receives is from pilots wondering why general aviation is in the same spot regarding unleaded avgas as it was 25 years ago.
Is it OK to cruise with an oil temperature of 245°?
I like this question because I can give a definite answer: No.
Can I use oil that’s 15 years old?
As with so many other things in aviation — and in life — the answer is not a simple yes or no.
The elephant in the room
As the quest to find an unleaded replacement for 100LL continues, why isn’t the government and industry getting behind a fuel that’s already been tested and approved?
If the glove fits…
Did you know you should wear rubber or latex gloves when changing your airplane’s oil? It’s important to protect yourself from the used oil and the harmful things that can accumulate in the oil from the combustion process.
A different kind of grounded
One of the biggest concerns for general aviation aircraft is where to connect the grounding or bonding cable when refueling.