I remember back when I used to work at supercheap auto magnatec was $28 and durablend was $26 and mobil 1 was $45. What's the chances valvoline upped their prices after that sheer test was released?
The cost of base oil more than doubled in price over the past 2-3 years. That and inflation, hence the price changes.
what is the sheer test?
also looking at the 10w-50 HPR10 full syn of penrite and 5-40 HPR5 full syn of penrite the penrite stuff seems better due the price its less then valvoline stuff not sure what to use.
A machine tests how much pressure an oil film can take before there's metal to metal contact I think.
Nah, don't use 10w50, 50 is too thick, sure it might minimise the oil burning but you're working the engine even harder, more likely to cause more harm than good not to mention worsen your fuel economy. And if you're the type to give it many hits in a night, think of it like running in thick sloppy mud...
Toda Racing AU | Shen * Speed Works | Jesse Streeter
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