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Les hva Corvette blad skriver

TESTING PROCEDURE AND EQUIPMENT
First up, we went into the local auto parts shop near the office and grabbed one of everything on the synthetic-oil shelf. The sales assistant looked at us as though we were crazy, and we are still wondering why. It’s no big deal to spend $1000 on oil, is it? With the oil purchased, it was off to the testing area to try them all. The test we carried out on each of the oils is a measurement of the film strength propertiesof lubricating fluids, with the test equipment used being manufactured by Falex, a world leader in tribology test equipment. It is known in the industry as the Falex Lubricity Tester and gives a result very similar ‘Timken OK Load Rating Test’. In the early 1930s, as a result of significant increases in horsepower and speeds in all types of industrial and automotive applications, extreme-pressure lubricants became popular. However, there was no standard to obtain comparative data on these lubricants. In response, Timken engineers developed a lubricant test machine, which provided an economical and reliable means to determine the film strength character-istics of lubricants. In 1935, the company began produc-ing and selling lubricant test machines. The lubricant test quickly became an industry standard. The maximum load – in pounds – a lubricant could withstand without failure due to breakdown of the lubricant film became known as the ‘Timken OK Load’ rating and is still an industry standard today.
As you can see in our images, the machine is pretty simple. A race spins on a shaft spun by an electric motor, with an arm holding a small Timken test bearing, which is placed on the race. The oil bath is filled with the oilsample, and the motor is switched on to lubricate the race (pic. two). Then the bearing is placed on the race (pic. three), and the lever arm is loaded up (pic. four) with individual 2lb (910g) weights to test the film strength of the oil sample. The lever accentuates the weight, effectively putting a 75lb stress on the bearing. In between each run, the Ti m k e n test bearing is replaced with a new one and the oil bath is cleaned thoroughly with Prepsol. The race is smoothed of any damage with emery paper and cleaned thoroughly with Prepsol. To work out the load-bearing capability of the oil in PSI, we used this formula: (Loading weight in lb + 1) x 32,858 (Scar length in mm) Think of the weight we are adding as big revs or boost putting pressure on the big ends and you will get an idea of how important film strength is in your choice of lubricant. It could be the difference between a healthy, happy engine and a mess of metal shards, tears and broken dreams. We have to make clear that this experiment only tests one specific attribute of each oil, so while the oils we tested may have performed poorly under these test conditions, they may perform better in other tests. Your engine bearings have a much larger surface area than in our test (obviously), so the wear characteristics will not be anywhere near as severe. The idea of this test is to demonstrate long-term wear in a short period of time, giving an idea of how a lubricant can protect your engine over long distances and periods of time. With this being said, when combined with the various claims of the manufacturers, these results can be used to make a more informed decision next time you are purchasing oil for your car.

MOBIL 1 0W-40
API Rating: SM Amperage: 4.1 Load Rating: 2lb Scar Length: 8mm
Pressure Resistance: 1540.22psi
What MOBIL says about its oil:
The new Mobil 1 0W-40 is a 100-percent fully synthetic motor oil formulated with the patented SuperSyn anti-wear technology. It provides outstanding protection, even during extended-use driving, coupled with excellent fuel-economy perfor-mance.
Mobil 1 offers unsurpassed protection for high-tech multi-valve engines, helps keep your engine running like new, improves engine protection during the critical start-up period, has excellent high- and low-temperature performance and a proven low fuel-consumption formula.
What we say:
The results truly speak for themselves in the case of Mobil 1. I have to say that we were truly astounded by them as well. It was outperformed by oils half the price and even by its semi-synthetic stablemate, Synth S. It took only 2lb to break through the oil film on the race, with the test leaving an 8mm scar on the test bearing and slight scorch marks from the heat caused by metal-on-metal friction.
After seeing so much advertising over the years for this lubricant, we were extremely surprised by the results and are sure you will be, too.

ROYAL PURPLE 10W-40 MULTIGRADE
API Rating: CF, CF-2/SJ Amperage: 3.7A Load Rating: 8lb Scar Length: 1.5mm Pressure Resistance: 131,432psi
What ROYAL PURPLE says about its oil:
Royal Purple motor oil is the only motor oil formulated with Royal Purple’s proprietary ‘Synerlec’ additive technology. The Synerlec additive technology forms a tough, synthetic, lubricating film on all metal surfaces, providing superior wear protection and improved engine performance.
It also fortifies the oil against heat-induced oil oxidisation, thereby increasing the service life of the oil. It increases h o r s e p o w e r, has better wear protection, increases fuel economy, reduces exhaust emissions and keeps engines clean. It meets or exceeds API service
What we say:
This Synerlec stuff really seems to work, as the wear on the bearing was negligible and actually demonstrated one of Royal Purple’s claims – micro polishing. The point of contact on the bearing does not have a low spot but has been polished. Unlike many of the other oils, the spot has no scratches or grazes – it is perfectly smooth – very impressive