Conventional oil is pumped out of the ground and refined, while synthetic is chemically modified petroleum that’s produced at a factory. Most new cars call for synthetic oil, although some still ...

If your mechanic recommends a high-mileage motor oil, how do you know when it's worth it to upgrade? And what are the pros ...

using a 5W-30 oil instead of a 10W-40 can improve mileage by up to 2%. This is because thinner oils circulate more easily, ...

In addition to coming in various thicknesses and weights — which are designed for numerous uses and applications, from engines to complex gear sets — engine oil also comes in conventional and ...

“The problem is people don’t maintain the engine oil,” he expressed. “If you follow the manufacturers guidelines for oil ...

Our long-termer is full of regular E10 unleaded to EN228 98 RON specification, as is Coryton’s Sustain petrol. John Barker, who actually paid attention at school and has certificates to prove ...