Is Castrol 10W40 Oil ok for a 06GT?
04-08-2006, 01:00 PM
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RE: Is Castrol 10W40 Oil ok for a 06GT?
UMMMMMMMMMMMMMMMMM One question, and many different answers.
First off, there is No such thing as "weight", when discussing motor oils. The "W" means WINTER, a 5W30 has the viscosity of 5 at extreme cold weather start-up (0 degrees) and the viscosity of 30 at operating temperature (around 170-200 degrees). Any motor oil that has a _W_ listing is known as a "multigrade"
All car manufacturers specify multigrade oils to cover their asses at "start-up" because they have no control over where the car ends up (Miami or the north Pole) in winter. You see 80% of engine wear occurs in your drive way and first 5 miles of daily driving, especially if the car has sat 8-10 hrs allowing the oil to drain completely to the crank case. This is the need for a lower viscosity oil as it's thinner at start-up and gets to the heads, cam, cyl walls, and valve train quicker. In many climates a straight 20 is fine.
Synthetics are molecularly changed oils and came about because the major oil manufacturers use such low grade cheap base stocks, so they began to reshape the molecular structure to lessen "shear". This is what breaks down motor oil, more so, than dirt.
Sorry if I've rambled, but, I make my living as a consultant, and the LE in my name stands for LUBRICATION ENGINEERS.
If anyone would like to discuss this further, please send an email.
THANKS !!!!!!!!!!
First off, there is No such thing as "weight", when discussing motor oils. The "W" means WINTER, a 5W30 has the viscosity of 5 at extreme cold weather start-up (0 degrees) and the viscosity of 30 at operating temperature (around 170-200 degrees). Any motor oil that has a _W_ listing is known as a "multigrade"
All car manufacturers specify multigrade oils to cover their asses at "start-up" because they have no control over where the car ends up (Miami or the north Pole) in winter. You see 80% of engine wear occurs in your drive way and first 5 miles of daily driving, especially if the car has sat 8-10 hrs allowing the oil to drain completely to the crank case. This is the need for a lower viscosity oil as it's thinner at start-up and gets to the heads, cam, cyl walls, and valve train quicker. In many climates a straight 20 is fine.
Synthetics are molecularly changed oils and came about because the major oil manufacturers use such low grade cheap base stocks, so they began to reshape the molecular structure to lessen "shear". This is what breaks down motor oil, more so, than dirt.
Sorry if I've rambled, but, I make my living as a consultant, and the LE in my name stands for LUBRICATION ENGINEERS.
If anyone would like to discuss this further, please send an email.
THANKS !!!!!!!!!!
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