When it’s brand new, a 5W-30 conventional motor oil acts exactly like a 5W-30 synthetic motor oil. Over time, however, the chemical additives used in the conventional oil to alter its properties ...

The two major differences between synthetic and conventional oil are a bit more subtle. First, the way the oils are made create a clear distinction. For example, conventional 5W-30 motor oil is a ...

Synthetic motor oil is a laboratory manufactured ... filter and filled the motor with 5.5 quarts of Royal Purple's SAE 5W-30 motor oil. 3. Our Toyota came with the four-speed automatic ...

if a broader motor oil brand ranking is something you might be interested in, we've got one of those lists as well. One last note — we've linked five-quart jugs of 5W-30 Full Synthetic oil ...

they cost more than comparable synthetic motor oils. For instance, five quarts of Mobil 1 Extended Performance 5W-30 High Mileage Motor Oil costs $32.47 (it's currently on sale on Amazon for $29. ...

Synthetic oil used to be something only performance ... The alphanumeric codes on a quart of oil—5W-30, 0W-20, etc.—denote its “weight,” or viscosity. Thicker, higher-viscosity liquids ...

Since synthetic oil has robust additives and ... today it represents just 2% of total sales. The No.1 motor oil today is 5W-30, which accounts for 56% of the light-duty market.

This synthetic motor oil performs well in both high temperature ... You'll see this information in a format that looks like 5w30 or something similar. The first number indicates viscosity at ...