| Started using AMSOIL 20W-50 in a 2002 Harley-Davidson FatBoy 10,000 miles after we bought it.
At 65,000 miles we decided to rebuild the engine to see how the oil performed.
When we tore it down we were amazed of how clean it was inside, also how little wear there was on the pistons, cylinder walls and connecting rods.
We bored the engine from 88" to 95" added a mid range cam, head work, fueling high volume oil pump and SS gear drive. Assembled the engine added a Power Commander and new pipes. Went from 65HP stock to around 110-115HP pumped.
We now have over 100,000 miles on it total with no engine issues.
I don't trust any oil but Amsoil in anything I own and drive.
Hear is the engine detailed with Thunderbolt Polish.
I use the best oil inside and the best cleaner polish on the outside.
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