one2dmax
Well-Known Member
According to the SAE engine oil viscosity classification, the number preceding the “W” indicates the suitability of an oil for colder temperature start-ups, with lower numbers delivering improved pumpability. The higher the numerical value, the thicker the oil film at increased temperatures. A higher second number in the viscosity rating of a multigrade engine oil – the “40” in 10W-40, for example - will also indicate a thicker film at higher temperatures.
Electrical current flows easier in colder temperatures (with some limitations). But in general a warm(er) car or engine will start easier until it reaches an apex point and starts going the other way. A hot(er) engine will in fact crank harder then one that is warm. Hence why sometimes a bike or car will not start when you have cut it off when driving and the engine is at temp. Then once cooled down a little will start right up.
Cheap batteries are fine. Sometimes you get lucky and get a good one, and sometimes you get what you pay for.
Electrical current flows easier in colder temperatures (with some limitations). But in general a warm(er) car or engine will start easier until it reaches an apex point and starts going the other way. A hot(er) engine will in fact crank harder then one that is warm. Hence why sometimes a bike or car will not start when you have cut it off when driving and the engine is at temp. Then once cooled down a little will start right up.
Cheap batteries are fine. Sometimes you get lucky and get a good one, and sometimes you get what you pay for.