Motor Oil Question
#12
#13
Motor Oil Question
Rotella all day everyday. The old goat just turned of 340,000miles. Have a few oil leaks I been wanting to fix so I pulled the motor decided to go ahead and replace bearings and piston rings. You can still see the hone marks on everything. That is because it is a well oiled machine.
Brandon
Brandon
#14
#15
It does flow better, bobcat! At least during the important cold start phase.
It's easy to compare- try to suck honey through a straw when cold. Try again at room temperature.
Same principle.
The most important part is not increased oil flow but lowered resistance to start the engine. At 32°F starting current is increased by 100%. At 0°F current is increased up to 250% with a standard oil.*
You can lower that resistance a lot with a thinner winter oil to enable a safe start. So a thinner oil is giving you a start insurance during cold weather.
* You find these numbers in the bosch automotive handbook. Bosch is the world biggest manufacturer of starters.
It's easy to compare- try to suck honey through a straw when cold. Try again at room temperature.
Same principle.
The most important part is not increased oil flow but lowered resistance to start the engine. At 32°F starting current is increased by 100%. At 0°F current is increased up to 250% with a standard oil.*
You can lower that resistance a lot with a thinner winter oil to enable a safe start. So a thinner oil is giving you a start insurance during cold weather.
* You find these numbers in the bosch automotive handbook. Bosch is the world biggest manufacturer of starters.
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bobcat67 (01-28-2011)
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