The 10w30 RLI I got was kinda low on the cSt @ 100 so I decided to mix it with the 15w40 to make it a 10w40. I also wanted to see how two multigrade oils of the same formulation would blend together. Kinda like an experiment.
50/50 Homebrew Blend of RLI Bio-SynXtra HD Low Ash 10w30 and 15w40.
60 mL of RLI 10w30
60 mL of RLI 15w40
3 mL of RLI Bio-Syn Booster Pack (2.5% by volume)
I have a small lab at work. We have beakers, pipettes, and magnetic stirrers. I think my measurements were pretty accurate. I mixed it for about 2-3 minutes with the biggest magnetic stirrer we had. I was careful to mix slowly as I did not want to aerate the combined sample.
According to the Widman calculator a 50/50 blend is:
77.51 cSt @ 40
12.96 cSt @ 100
VI = 169
78.8 cSt @ 40
13.3 cSt @ 100
VI = 172
It's pretty close. Honestly, closer than I thought it would be. I can see the booster pack raised the Sb to over 500 ppm.
Can you guys see any problems using this stuff ? Thoughts, observations, concerns, etc...