Join Date: Apr 2018
Location: Cape Coral, Florida
2018 Yamaha Star Venture V-Twin What Oil Are You Using And Your Results
Being this engine has a redesign done to it and this bike is a new model from Yamaha it would be a help for others if people listed what oil they are using and their results and impressions of the oil in this redesigned engine/primary/transmission.
I have tried the 50 weight oil in mine and the 40 weight, in my case the bike comes from the factory with Yamalube 10w-40 conventional oil, the 600 mile service the dealer again used Yamalube 10w-40 conventional oil. Being I am a believer in synthetic oil I changed the oil and filter again at the 1,000 mile mark using Redline 20w-50 because I still had some left from owning my Harley Davidson. The engine was smooth and the transmission shifted smooth for the next 3,000 miles to the 4,000 mile service.
I ran that oil for 3,000 miles until the 4,000 mile service where I requested the dealer change the oil filter and use Yamalube 15w-50 synthetic oil. I can not confirm what oil the dealer put in the bike except to say it shows up as a heavy 50 weight to a light 60 weight oil on the Blackstone lab oil test I had done when I changed the oil again at the 5,341 mile mark. The dealer could have used Yamalube 15w-50 synthetic or they could have used Yamalube 20w-50 conventional oil, I don't know. I do know the dealer did not change the oil filter as I requested as the oil filter still had the same plier type oil filter wrench marks on it from my plier type oil filter wrench I used to install the filter. I did not yet have an end cap filer wrench to fit these Yamaha oil filters like the dealers have. I now have the Yamaha end cap oil filter wrench that the dealers use and I highly recommend this oil filter wrench as it is very high quality.
While I am giving the dealer benefit of the doubt in the Blackstone lab thread that they did use Yamalube 15w-50 synthetic oil I have my strong doubts and think they used 20w-50 Yamalube conventional oil instead.
My reason for thinking this is because the engine just ran rougher and the transmission shifted just a little harder. The engine ran smoother and the transmission shifted smoother with the Redline 20w-50 synthetic and now that I put in the Redline 10w-40 synthetic oil it is running nice and smooth and the transmission is shifting smoother again.
I have decided to stick with the Redline 10w-40 synthetic oil which uses a PAO and Ester base stock, the advantage of Ester is it has a positive polarity and will cling to the metal engine parts instead of draining off them which is a benefit to cold starts.
Synthetic oil to me is a better solution in these air cooled V-Twin engines especially when they are a shared sump design with a gear driven primary. If you get into high temps or have to sit in some traffic a synthetic oil is not going to breakdown like a conventional group 2 or hydro-cracked conventional group 3 oil will so you end up with far better protection for the engine/primary/transmission in the long run. Remember that Castrol won a decision over Mobil many years ago that changed everything when it comes to synthetic oil, the NAD (National Advertising Division) ruled that Castrol could call their group 3 hydro-cracked conventional oil full synthetic even though it is not made in a lab with every molecule being the same like a true synthetic oil is. In my opinion the NAD and API for going along did a huge disservice to consumers with that ruling. In Germany they can't label group 3 hydro-cracked oil as synthetic, only group 4 and group 5 oils can be labeled synthetic over there which is how it should be here as well.
So I am running Redline 10w-40 synthetic in mine.
What are you other Star Venture owners running and how do you like it?
Last edited by American; 07-18-2018 at 10:14 AM.