Tonto's always been a little cranky(pun) when starting in cold weather(45F and below). With my 5 year warranty expired(Dec of 2019) and using only Indian brand oil, I decided(after much research) to go with Castrol's Actevo 10W40 4T part synthetic MC oil. I believe the Indian's 20/40 is made by Castrol and since Castrol stopped selling their version of this oil to the public, Indian has a monopoly on the 20/40 Semi-Synth blend they sell... IT'S A SCAM!...3000 miles after coveting to the Castrol 10/40 and there is a noticeable difference in the motor's character( 2014 Chieftain #2138 with almost 80,000 miles). The bike runs smoother, quieter, my MPG got better and the cold weather starts(so far only 45F) have been flawless! All I can say is try it and see for your self.
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