another oil question
Cruiser
Joined: Aug 2009
Posts: 154
Likes: 0
From: Cedartown, Ga.
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
After reading a bunch on oils, it is a popular thread starter...
U can use the 15-50, buuuuuut,!!!!!! I've seen an oil annalist on it where is brakes down and thins out to 15-40 weight really quick.......
So IMO if U have that in say below 60 temp it would probably be fine..... Like fall and spring
So, but I would stick with the V-twin 20w-50 in the hotter parts of the summer.
Just an ole Retired Machine repairman's observation.....from a lot of reading.
U can use the 15-50, buuuuuut,!!!!!! I've seen an oil annalist on it where is brakes down and thins out to 15-40 weight really quick.......
So IMO if U have that in say below 60 temp it would probably be fine..... Like fall and spring
So, but I would stick with the V-twin 20w-50 in the hotter parts of the summer.
Just an ole Retired Machine repairman's observation.....from a lot of reading.
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
It shears to a 40w in about 1000 miles according to the oil analysis I have seen with the 15w50 in TC engines. I believe you would be better off with a 15w40 diesel oil like Rotella or Delo or Delvac if price is an issue. The Diesel oils seem to stay in grade longer and are even less than the Mobil1 15w50.
Road Master
Joined: Oct 2009
Posts: 1,074
Likes: 1
From: Baltimore, MD
It shears to a 40w in about 1000 miles according to the oil analysis I have seen with the 15w50 in TC engines. I believe you would be better off with a 15w40 diesel oil like Rotella or Delo or Delvac if price is an issue. The Diesel oils seem to stay in grade longer and are even less than the Mobil1 15w50.
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
I am guilty of the same wanting the best for my bike too...
I put my all my 38 yrs of being a machine repairman experience into it and after my warranty was up and listening to the dealers...I believe Mobil 1 V-twin is the one of the best over all.... its easy to find and buy.
I am tired of the Amsoil adds and really after reading in here of the last 3 motors that had problems, they all used Amsoil oil so I won't use there oil.
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Joe Kucinski
Road Master
Joined: Oct 2009
Posts: 1,074
Likes: 1
From: Baltimore, MD
It's not the money. You guys are splitting hairs here. Most wear happens on intitial startup. Well documented. Whether an oil shears to 40 weight is not a big deal to me. Todays oil is so freaking good compared to just 10 years ago, it's all good stuff. If there were a real difference between these two oils, it would show up in the oil temp. readings. I've used both and did not see a difference. Do the proper maintenance with any oil you choose. Funny how M1 puts "V-Twin" on the packaging everbody thinks it's better! I did notice lower oil temps. with both viscosity Mobile1's than the Harley synthetic though.
