Ian C Posted May 23, 2006 Share Posted May 23, 2006 Hi all, Steve was kind enough to write up a load of stuff about oil and oil analysis, and as he doesn't sell the stuff I was interested in it I found it very informative and hope you all do to - please read and discuss and we'll shift this to the tech discussions section in good time -IanOIL ANALYSIS WRITEUP.doc Quote Link to comment Share on other sites More sharing options...
tbourner Posted May 23, 2006 Share Posted May 23, 2006 Maybe we could get a table of different oils and all their viscosity, VI, flash point, pour point, ash content, zinc content, and API classifications? Would probably be a PITA to create such a document but would surely be beneficial and not only to our group! I'm probably saying that in the hope that there'll be a definitive oil we should all use - and I'll be really disappointed when the table arrives! Quote Link to comment Share on other sites More sharing options...
Kranz Posted May 23, 2006 Share Posted May 23, 2006 Lookin into that one... and it is a right PITA Quote Link to comment Share on other sites More sharing options...
oilman Posted May 26, 2006 Share Posted May 26, 2006 I have all the data on numerous oils but flashpoint, pourpoint, viscosity at 100degC and VI Index actually tell you nothing of interest. What you really need to know is the HTHS number and Noak volatility % as they give the best clues to the actual quality of the basestock used. Unfortunaltely for obvious reasons many oil companies do not publish these figures and are reluctant to give them.........it just makes me suspicious of their claims! What I can say is that over the last 2 years we have tested more than 50 oils in the lab and have been mightely dissapointed over the results compared to the claims. American oils seem to fare worse but there are many European oils that have less than a decent percentage of the good stuff in them. By far the best quality oils that we have tested are the Silkolene Pro S and Pro R plus the Motul 300V but to be fair they are race oils that can be used on the street and therefore contain extremely high quality basestocks and high ester content. Believe me when I say oil is not oil I sincerely mean it, don't be fooled by the fancy marketing and the word synthetic, in 90% of the cases we have seen, it's a much abused and used word! Cheers Simon Quote Link to comment Share on other sites More sharing options...
Kranz Posted May 26, 2006 Share Posted May 26, 2006 Agreed, the High Temp High Shear test gives a good indication of the oil's ability to cope under the most stressful conditions. These are similar to the conditions the cam & follower generate & the more an oil can hold its viscosity under this punishment, the better the quality. Also the NOAK is good to indicate how the oil will thicken due to evaporative loss during extreme service. Basically, the higher the HTHS number for the hot weight of the oil the better, and the lower the NOAK % the better. But add in all the rest of the information & it all gives an indication of the quality of the oil. If its all we've got to go by then it all helps. Other than that, there's recommendation by the Oilman As Simon says (I'm sure that's a game??) there's a lot of supposed synthetics out there that are pure c**p compared to the best. You get what you pay for, just be sure you're paying for the best! Quote Link to comment Share on other sites More sharing options...
oilman Posted May 26, 2006 Share Posted May 26, 2006 You know your stuff matey, spot on and well explained. You'll not find may with higher HTHS and lower Noack numbers than the Silkolene Pro or the Motul 300V, very similar brews with a almost identical chemical traces. Cheers Simon Quote Link to comment Share on other sites More sharing options...
andrew7 Posted May 27, 2006 Share Posted May 27, 2006 You know your stuff matey, spot on and well explained. You'll not find may with higher HTHS and lower Noack numbers than the Silkolene Pro or the Motul 300V, very similar brews with a almost identical chemical traces. Cheers Simon Simon, how does Amsoil compare with these two?... Quote Link to comment Share on other sites More sharing options...
JohnA Posted May 27, 2006 Share Posted May 27, 2006 Useful contribution for the tech section Quote Link to comment Share on other sites More sharing options...
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