It gets even more confusing when trying to decide which kind of motor oil you should use. 10W-30, for example, sounds very close to 10W-40. After all, how different can they be? 10W-30 and 10W-40 ...

and heavier oil when hot. As an example, a 10W-40 oil (the W stands for winter in multi-grades) flows like 10-weight at 32 degrees and 40-weight at 212 degrees. The advantage to this is that the ...

RAY: Then, multiviscosity oils were invented. So, for instance, you could use a 10W-40 oil that would act like a 10-weight (thinner) oil when the temperature was low and a 40-weight (thicker ...

Naturally, to get the most out of their performance, you will need engine oil that's on par with the mower's powerhouse. So, what kind should you use? Kawasaki lawn mower engines take 10W-40 ...

I would use 10W-30 or 10W-40 oil. Many people with older cars use Shell Rotella T5 oil which is a synthetic blend-first formulated for diesels. But any quality 10W-40 10W-30 designed for older ...

Lightweight oil flows more easily and can get into all the nooks and crannies inside an engine easier than, say, 10W-40. Basically, modern cars use lighter, lower-viscosity oils because they can.

I change the oil every 4,000 miles. At the last oil change I changed it to 10W-40 although the manual calls for 5W-30; this seems to have helped the oil pressure. Is it OK to continue with 10W-40 oil?

I change the oil every 4,000 miles. At the last oil change, I changed it to 10W-40 although the manual calls for 5W-30; this seems to have helped the oil pressure. Is it OK to continue with 10W-40 ...