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Getting ready to do my annual oil change on my 2015 Roadmaster. Going to continue using Amsoil V-Twin oil. I have been using 20W-40 but would like to get your thoughts on the 15W-60 oil use in the RM. What does Indian say about using it? Would seem the thicker oil would be great in the summer heat.
 

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'17 Springfield, '20 Chieftain
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Synthetic 15W-60 is the recommended oil for the Scout which according to Indian is also approved for use in their 111 TS engines. I have been using their 20W-40 oil kits for the past two years while under warranty. However, my warranty just expired and I plan to start using Synthetic 20W-50 or similar from this point out. I live in Texas, and with the heat and the fact that these are air cooled bikes, I think a heavier weighted oil would be beneficial.
 

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I live in the hottest spot in the lower 48 where people actually live. I use the scout oil in my 111. It has no oil cooler. Runs superb.
 

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I can tell you that after 5000 plus hard miles, my oil comes out looking pretty fresh - the scout oil, in my opinion, also helps the engine run quieter.
 

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A fellow member posted the article from Indian saying the 15 W 60 is acceptable and can be used in the 111. About mid April of this year I hit my 5,000 mile service and oil change. My mechanic advised me of this change and said he been using it in his wife bike. What noise I have left in the motor after the stage 2 cams and Craig B tune... changing to this oil got rid of the last bit of noise I heard. Bike runs smooth I’ve got about 200 miles on this oil and I’m gonna stock with it.
 

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I've got 3 Gallons of Shell Rotella 15w-60 sitting on my workbench waiting to change both the Chieftain Dark Horse and the Wife's Bobber now that they all take the same oil. I'm just waiting on the crush washers to be delievered.. I forgot about those damn things.
 

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I run fairly hard and I’ve run 20w60 for years with excellent results in my Harleys. At the first 500 change I also put it in my chieftain. But the majority of my miles are 2 up loaded down. JMO but for these air-cooled pushrod motors I think the 20w40 is to lite an oil. But larry s on here is probably pushing 325,000 at a minimum and that’s all he runs is the 60. Never been inside the motor. That’s about the best answer I can think of right there.
 

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Found it at Wal-Mart, of all places. It was also on sale. I also made a typo - I got 15w-40. Sorry about that. One of the other multiple oil threads said that was "ok to use" as well. I hope they are right... lol
Funny you said typo, I looked up 15W60 and Walmart was the first thing that popped up. SN and JASO MA2 ranted fully synthetic. Never heard of this stuff before.


640241
 

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Funny you said typo, I looked up 15W60 and Walmart was the first thing that popped up. SN and JASO MA2 ranted fully synthetic. Never heard of this stuff before.

My only issue with that would be trying to figure out how much to put into the bike. Unless it comes in actual quart bottles, I wouldn't be able to use.

My math is THAT bad and/or I'm that dumb. If the oil doesn't come in quarts so I know how many I'm putting in.... I won't buy it. I've tried it once before and it was a horrendous mess. Never again.
 

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If you buy a quart container of whatever oil, which generally comes in a plastic quart container and usually has measurement marks in oz. increments [32 oz. equals one quart] stamped right on one side of that plastic quart container,you can now use that for future measurements to put in as much or as little oz.of oil as required to complete your fill without over filling the crankcase.Follow me?? I sometimes buy my oil in a five qt.package and save one of those plastic quart containers for that purpose.

Ex. If your bike holds 4 1/2 quarts of oil,ya put in the gallon [4 quarts] then using one of the now empty quart containers, you put in the extra 16 oz.needed [as stamped on the side of that container] to complete the fill "WITHOUT OVER FILLING the crankcase.Follow me??? Dave!!!
 

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That's why I like the Indian oil change kits. They have the correct amount of oil for the given model. Also the crush washers (or O-ring in the case of the Challenger) and the correct oil filter. Pretty near fool-proof!
 
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