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Nasty Sausage · 01-14-2014, 02:52 PM

I hope no one is driving around at that temperature either! That's reserved for Lambos in flames.

I sure did mean the Amsoil signature series. I am unable to find the NOACK volatility for the Motul 8100 on their website, but Amsoil claims their SS 0W20 is 9.3 %, which is higher than the 9% figure for Red Line 0W20.

I did a UOA on the 5W30 Amsoil SS in my IS300 after 12k miles and the TBN was 8.8, so I don't think that this particular series of oil deteriorates very rapidly, or at least to that point immediately. I did add half a quart over that time. I suppose it could have dropped TBN within the first few thousand miles, but that is probably unlikely. I'm almost certain the 0W20 Amsoil SS will degrade more due to the higher NOACK volatility rating, but I'll find out in 5k miles.

I have little experience with Motul except their excellent RBF660 brake fluid. What is your opinion on the rate at which the Motul 8100 0W20 degrades at, say, 10k miles compared to the Red Line and Amsoil? I am hesitant to try it because I just noticed that they do not publish the NOACK volatility on their website. I know this isn't an end all be all, but it's a decent corollary to the oil stock quality.

01-14-2014, 02:52 PM	#18
Nasty Sausage Member Join Date: Jan 2014 Drives: '13 Asphalt FRS 6MT, '04 IS 5MT/LSD Location: Tampa Posts: 64 Thanks: 1,014 Thanked 197 Times in 83 Posts Mentioned: 2 Post(s)	I hope no one is driving around at that temperature either! That's reserved for Lambos in flames. I sure did mean the Amsoil signature series. I am unable to find the NOACK volatility for the Motul 8100 on their website, but Amsoil claims their SS 0W20 is 9.3 %, which is higher than the 9% figure for Red Line 0W20. I did a UOA on the 5W30 Amsoil SS in my IS300 after 12k miles and the TBN was 8.8, so I don't think that this particular series of oil deteriorates very rapidly, or at least to that point immediately. I did add half a quart over that time. I suppose it could have dropped TBN within the first few thousand miles, but that is probably unlikely. I'm almost certain the 0W20 Amsoil SS will degrade more due to the higher NOACK volatility rating, but I'll find out in 5k miles. I have little experience with Motul except their excellent RBF660 brake fluid. What is your opinion on the rate at which the Motul 8100 0W20 degrades at, say, 10k miles compared to the Red Line and Amsoil? I am hesitant to try it because I just noticed that they do not publish the NOACK volatility on their website. I know this isn't an end all be all, but it's a decent corollary to the oil stock quality.