Synthetic blend and fully synthetic oils are both improvements over conventional motor oil, but how do these more premium ...

Yet, its motor oil products are limited to just two lines, namely its Pro Performance conventional oil and its SYN Full Synthetic oil, each available in grades of 5W-20, 5W-30, and 10W-30.

For heavy-duty vehicles: The Rubia Optima 1300 engine oil range is available in grades 15W-40 and 10W-30 (with Fuel Economy technology). What are the advantages of switching to synthetic ...