Originally Posted by Jimiii
Bonz- as far as the oil shearing in a shared sump, taking extreme heat out of the equation, the "VI's" will be broken into useless little pieces within the first 600-800 miles by the transmission gears. Very little shearing will continue, at least at a much slower rate, after that. The reason true synthetic bases (group 4/5), shear less is that they need far less "VI's", as a real synthetic oil base does not thin as much with heat, so there are less VI's" to begin with- less to get ground up in transmission. Your example indicates the Mobil 1 10-40 cycle oil has more quality base to begin with, then does the 15-50.
If alarmguy sends off his 15-50 fo analysis, it will be interesting to see how it holds up when subjected to only high heat. BTW I use only Mobil 1 15-50 in my 2014 limited with 4000 mile oci's.
My previous bike was an 1800 Goldwing and I used Mobil 1 5-40 turbo diesel in it for the entire 108,000 miles I owned it. I did do an analysis, 4000 mile oci. The 5-40 did shear slightly in that shared sump Goldwing, but stayed close.
Alarmguy- I agree that if you get the Mystic cheap, and change it often, and the oil is doing its job for the miles it is in the engine, that's a good plan.
Somehow I missed this post, many times I am on the run looking at my phone, except mornings with my coffee and Mac desktop.
Good post and good explanation, I agree on the viscosity but would add that I dont care if its conventional or synthetic, from what I have seen in the last dare I say decade of UOAs ... its more the spread such as a 5/40 Rotella vs a 15 or 20.
What caught my attention and glad I finally saw your post is that you are using Mobil 1 15/50. Very cool.
Anything I say past this sentence I am on the fence about right now, so here we go
)
Im not sure if I am going to do a UOA on the Mobile 1. I started this all out just as an experiment to see if a full syn vs a semi syn would result in lower oil temperatures.
Im not saying I ever believed it, or better said, never believed that there would be a large difference but some have claimed it in the past and I am testing that theory trying out the Mobil 1 15/50 vs the Mystic 15/50. With that said I fully intend to go back to the Mystik, another reason was also I was getting low on my 8 gallon supply of the Mystik and wasnt sure if would have enough left over to change the oil in my boat in which I use the Mystik, so played it safe and thought this would be the perfect time to try the Mobil 1 in the bike, well, I have just enough Mystik left over for the bike so easy for me to change back at anytime and/or order more.
Anyway, so my impressions are not any different then the Mystik really, Im surprised the engine doesnt sound much different but there is one concern and here is where I went wrong with the Mobil 1 test (so maybe I will try it again) With the Mobile 1 I am also using a HiFlo filter, I have used them in the past and, well, its a filter.
Anyway, making the following statement is very premature, the other day after the bike was sitting a week I was surprised to start the bike and here a VERY brief "clatter" the same exact clatter you here after you change the oil and filter. Except this one lasted only about 1 or 2 seconds, very brief but enough to say to myself hmmmm ... is it the Mobil 1 or HiFlo? Maybe the filter bled down a little or was the Mobile 1 a little thin and bled down. Maybe I will never hear it again.
After thinking about it for a week, I think it is the HiFlo and might switch that out to the HD filter. I am REALLY trying to recall but thinking back some time ago, I thought I experienced the same thing when I tired a HiFlo in the past, went back to HD filters but as time went on I forgot about it and bought two more HiFlo's anyway...
So, today is Friday, its looking like we will be doing our 2 hour 2up interstate trip to the Beach on a nice hot day tomorrow. Saturday, high is supposed to be 93 degrees (hope not lower) but I am hoping more for 95+ but only talking a few degrees, 93 is acceptable for over a 1.5 hour interstate run and 20 local traffic run (each way).
Thing about the weather here in SC is until the night before, you never know if the forecast is going to be correct. I guess we live in an area of the country where to this day, forecasts are soooooo unreliable.
If we go Ill know exactly how my oil temp experiment goes, I made this trip so many times as I said, I know the oils temps like the back of my hand with the Mystik and will be an interesting comparison. Once done I may or may not dump the Mobil 1 when I get home and go back to the Mystik. I'll know more for sure. I kind of expect it to be the same, temp wise and noise wise just based on local riding.
Anyway, cool to hear you use the Mobil 1. Im sure its a good oil for the bike, I just have this hang up and wish it was rated HEDO higher then CF.
I know it doesnt matter, but again, doesnt matter if I go back to the Mystik either. Soooooo ... well .. *LOL* ... whatever ! Its oil!
Heck I could get crazy and keep with the Mobil, if I did that, I would do a UOA for fun.