BUP

iTrader: (9)

Some of those changed currently as that was 10 years ago. Merc now makes it a point to have their name on the MSDS sheets without listing the true manu.

BUP

iTrader: (9)

http://www.kelloggmarine.com/msds/ME...oncentrate.pdf

BUP

iTrader: (9)

Got to love the snake oils and all the alcohol in the gas additives -- many OEM marine fuel additives contain a from of alcohol. Merc above MSDS has ---- Isopropanol in the mix is the main component 95 %

https://www.reference.com/science/is...59c654aac896eb

Questofpower

Great what happen to the calls for Valvoline VR1 20w-50 Racing oil..... now I am going to have drain my engines and put something else in them. Drain my outdrives because that changed too quicksilver gear lube is no longer the good stuff and now thanks to BUP I have to drain my fuel tank that I just filled up because of an addtive I put in it. Next winter I am just going ot leave everything emtpy until spring when you guys make up your minds on what I should be running. Thinking that might save me a few coins in spring of 2018.

One thing I didn't think of until now is I have Mobile one filters and Valvoline oil in my motors I better get those filters changed (probably to Fram) because I am sure Mobile and Valvoline are not compatible.

SB

iTrader: (1)

Here:
http://www.kewengineering.co.uk/Auto..._explained.htm

sutphen 30

I use what works.even if I only change it 2 or 3 times in a decade.

MILD THUNDER

iTrader: (3)

I think its more of a viscosity vs temperature thing. Cooler the temperature, higher the viscosity.

The viscosities at 104*
15w50 mobil = 125 CST
5w50 mobil = 108 CST
10w30 = 77 CST
20w50 = 181 CST
straight 40 = 136 CST
straight 50 = 219 CST

At 212*
15w50 mobil -= 18 CST
5w50 mobil = 17.5 CST
10w30 = 11.5 CST
20w50 = 20.5 CST
straight 40 = 14.5 CST
straight 50 = 20.0 CST

Pour points.
10w30 = -27.4* F
Straight 40 = -16.6 * F
Straight 50 = -0.4 * F
20w50 = -11* F

A straight 40 grade oil, has less viscosity at 104* temp, than a 20w50 , and pours to a colder temperature, than a 20w50? Mobils 15w50, seems to have ALOT less viscosity at 104*, than a VR1 20w50.

SB

iTrader: (1)

You use Mobil 1 Vtwin - it is loaded hard with phosphorus and zinc. It is also designed for engines (Harley of course) that are air cooled and thus encounter major oil temps.
Go to the bottom of: https://mobiloil.com/~/media/amer/us...pecs-guide.pdf

BUP

iTrader: (9)

Don't kill the messenger for the fuel adds. There is one on the market that is straight ethanol and they use to market very heavily on the marine side. Yamaha branded fuel adds all went to non alcohol base products for the fuel systems. It has been known for the last 20 years that many fuel adds for the marine side was mostly alcohol based.

BUP

iTrader: (9)

Maybe a good read for some and as I said before about inexpensive off the self diesel oils. Would not use them in a marine app currently. Their ZDDP levels have fallen greatly.

Just adding --- The 3.0 - 4 banger marine side still used Flat tappets and I can not tell you how many times I seen bad lobes on their camshafts from owners doing their own changes, Buying EPA mandated auto oils off the shelf.

FWIW below

http://www.enginebuildermag.com/2017...84&bid=1760177