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**Alkanyadela** · 01-10-2007, 12:29 AM

I'm aware alot more modern cars these days tend to use Semi-synthetic or fully synthetic for engine oils (fair play, as this work alot better than mineral oils). However I'm aware that you shouldn't just empty an engine that has been running on mineral oil for many years straight to a fully synthetic oil. Or is it safe to do so?

Mineral/synthetic/half synthetic are not really big differences.
Viscosity and thickness in cold/warm temperatures is what counts. Usually just stick with the oil that the car manufactures prescribes is best and safest way to go..

01-10-2007, 12:29 AM	#5
Alkanyadela Join Date Oct 2005 Posts 460 Senior Member	I'm aware alot more modern cars these days tend to use Semi-synthetic or fully synthetic for engine oils (fair play, as this work alot better than mineral oils). However I'm aware that you shouldn't just empty an engine that has been running on mineral oil for many years straight to a fully synthetic oil. Or is it safe to do so? Mineral/synthetic/half synthetic are not really big differences. Viscosity and thickness in cold/warm temperatures is what counts. Usually just stick with the oil that the car manufactures prescribes is best and safest way to go..
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