I just did some maintenance to my K8 Vee and rode it in to work in the morning and I heard some engine pinging. It was very slight, like the metallic sound of coins or keys lightly vibrating with the vibration of the engine. It made the sound both when moving or stationary in Neutral, peaking at 3500RPM. Engine temperature and performance was normal.
I think I know where I messed up ... I'd just like to know if I'm wrong.
Here's the scenario:
1)Just changed the oil, and put in Valvoline 10W-40 conventional
2)Just flushed and changed the radiator fluid, level is stable at MAX
3)Just added 7oz (just under half a bottle) of sea foam to the ~3.5gal (estimated total) of gas that was in the tank (2 oz/gal) ... also note that some of the 3.5gal came from a gas can that I just filled up, but had recently been sitting empty for a few months directly on the ground outside, but protected from rain.
Now that my engine is pinging, I'm thinking using the gas can was my mistake since it may have had condensed water collecting inside.
A few minutes ago, I topped off the tank (~3.5 more gal) with 93 octane and I'm going to drive it back home.
Should I do anything else?