How can you tell the physical differences between a conventional motor oil to a synthetic one?

If you mean by ';physical'; they look and even smell the same.





In fact they are just engine oil except more pure. By synthesizing engine oil (instead of purifying using distillery), they can make 100% pure of the desired molecules and none of the undesired molecules.





So it is like asking how can you physically tell (by look, smell and taste) the difference between unadulterated honey and the cheaper kind - you can't.





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It is also the reason why you need to look over the technicians when you ask for synthetic oil at the quicky lube. There was a TV report (you can find it at You Tube) about Jiffy Lube not doing the work promised. You'll never know unless you spend the $$ to have it lab analysed





Good LuckHow can you tell the physical differences between a conventional motor oil to a synthetic one?
you cant without a lab. .....synthetic mean,s a man made,identical copy......only better.How can you tell the physical differences between a conventional motor oil to a synthetic one?
If you had two bulk oil jugs and forgot which one to put into the station wagon and which one to put into the porsche... you'd be a gambler to try to guess which is synthetic. Syn oil is generally less viscous than a conventional, sometimes it's a little lighter in color, sometimes it has die added to it. Most tests require some lab items and special tools.
Sort of hard for me to explain. Synthetics usually last alot longer and are being put into more new vehicles. check www.amsoil.com