Here are our best-selling passenger car engine oil and diesel motor oil viscosities for the past year. These statistics are based on our sales only, so these numbers are not indicative of sales in the overall motor oil market. Passenger … [Read more...]
What Is The Shelf Life Of An Opened Bottle Of Motor Oil?
A reader asks: How long is motor oil usable after the bottle has been opened? Our answer: Once the seal has been cracked on a bottle of motor oil, the remaining oil should be used up within one year. This guideline also applies to transmission oil … [Read more...]
How To Choose The Correct Motor Oil
Finding the correct motor oil is a simple task, if you are armed with the correct information. But there are serious pitfalls that you must avoid. Shopping for motor oil should be a straight forward task, but we see mistakes made all the time and … [Read more...]
Should I Switch To 10W-30 Motor Oil For Summer?
A reader asks: I use 5W-30 motor oil in my Infinti G35 during the winter and my owner’s manual suggests that it is suitable to use 10W-30 in warmer temperatures. Is there any real benefit to switching to 10W-30 in the summer and back to 5W-30 in the … [Read more...]
