Synthetics have been used for years in Motorcycles ...... for so many years I can barely remember when I used a non-synthetic oil .......... early 70's maybe ........
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F1 cars have also been on synthetics for years ........ minimum 20 years ........... probably more. Honda - when they dominated F1 years ago - adhered to the 'best' philosophy; they built or used the best available .... produced the best engine, used the best suppliers, had the best drivers. Honda used Mobil 1 oil.
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I don't think I would use 'Stock Cars' as an example .... that is a sponser driven circuit ...... a different animal (they still run carburetors) ... and generally use what their sponsers tell them to run .........
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many/most ? big diesel rigs now run synthetics ...... even 'old fart' farmers - many are using synthetics in their vintage tractors .....
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