Is there an advantage to using synthetic oils in street cars?? Adverse effects on engine longevity or efficiency?? Just asking, because I have never considered using synthetic based on the higher price and have not seen empirical evidence that they were better? Please comment.
I would use synthetics in a car that put particular stress, especially heat, on the engine oil. The example that comes to mind would be turbocharged or supercharged cars. Other than that, I’d just change regular dino-oil every 3k-5k miles.
When oil prices rose the differential between synthetics and conventional oil closed. Every mechanic I know tells me I can elongate my oil change intervals. I drive an ‘04 frontier (v6) and I change the oil every 4k miles with Mobil 1.In ten years I may have an informed position on the synthetics.....or not.
I’ve used only Mobil 1 synthetic oil in the last two vehicles I’ve owned and neither has used a drop of oil between changes. One was a Volvo with turbo which had 104K miles when I disposed of it and the replacement is a GMC pickup with 30K miles.
Engines have been getting better with time, so I can’t attribute it to just the Mobil 1, but I intend to continue using it.
Jack