Det här är enligt mig den bästa test jag läst och studerat. Har kört på Kendall 20/50W tidigare, ska nog ta och bytas ut nu.
OIL TEST DATA, ladda hem härTyvärr så står det på engelska..An explanation for the spreadsheets:
First of all, the sections with blue text/numbers are used oil samples. The Sections with Red text/numbers are samples with 30% Lucas additive. Units are at the bottoms of the columns and all temps are in F.
Under sheet Data 1:
Wetness: higher numbers are better but anything 10 and over is good.
Viscosity: Numbers in seconds to run down a 45 ramp 2 inches, lower is thinner or better flowing, higher is thicker.
Friction: measured in Newton’s, lower is always better.
Coating: how well it stuck to the parts over night, higher is always better and everything even if it said 0 left at least a film type layer.
Water rejection: self explanatory running from acceptable to outstanding.
% Foam: Less is always better, this represents how much foam was produced and remained after adding water and agitating the samples. This is a percentage of the water that is foamed, not the oil (caused by chemicals in the oil dissolving in the water).
Weight is just that, how much a single ml of the oil would weigh in grams, this is only really useful for doing calculations with heat.
Under the Specific Heats sheet:
First you see the actual temps in F, fallowed by the change in temp from start to finish of the 20min run. Then weight per gram, weight of the total sample used (40ml was used, but it’s important to discuss mass when talking about heat). The final column (T/M) is simply total mass of the sample divided by the change in temp over the total 20min. This last number although not directly useful, is representative of how the oil performs agents it’s competitors, with higher numbers indicating a better ability to carry heat energy. Any thing over 1.0 in the last column is good and keep in mined that I had no way of testing how well an oil transfers heat energy so the comparison is limited and should be cross referenced with the Wetness test from the first page.
As for my opinion on the oils I have tested…
After working with so much oil, this is what I think. I will continue to use Syntec 10w40 as it preformed admirably all around and is not too terribly expensive, but if I did switch to something different, I would step up to Redline 10w40 or do some testing on some Royal Purple and see how that compares. I would not bother running a thicker Xw50 unless my motor was heavily modified, as the 10w40 held up well for the 3000 miles I torched it for this test and is therefore more than sufficiently protective for my motor.
I would tend to stay away from Lucas, though it did help some conventional oils it was not a really satisfying product, particularly for the price. I would however recommend Lucas as an assembly lube when building a motor, for it’s wonderful ability to stick to everything forever and the fact that it would dissolve and be carried away after the initial start up.
The Synthetics did perform better than the conventional in more than just the numeric manner that you see on the data sheets and are well worth the money you spend stepping up to one, especially in cold climates and harsh conditions. I however would probably steer away from the Walmart brand for my Supra, even though it is more than adequate for your beater car.
