Verified my suspicion that Pennzoil was almost as bad as Valvoline. Never trust a product that relies on saturation advertising. Havoline is the best, before you go synthetic.
You really need to learn more than what you think you already know when it comes to oil...I worked for Ashland Oil, AKA Valvoline for 20 years or so before my second and last retirement...lol.
Synthetic oil is superior as long as it is not derived from a "cracked hydrogenation" process, AKA (hydrocracking/hydroprocessing), process which really only qualifies as a semi-synthetic oil in the rest of the world other than the USA....,This is what Mobil One actually is in chemical analysis, a semi-synthetic oil because it is made from a cracked hydrogenated process and must be labeled as such in the rest of the world markets.
As far as synthetics go, Amsoil, VP, Royal Purple, Lucas, and ELF for 2 cycle motors...and Amsoil, Valvoline, VP, Royal Purple, Lucas and ELF oil for 4 cycles...Did you notice I did not mention Valvoline for 2 cycle???...They only make conventional and semi-synthetic for 2 strokes.
Bottom line is that most oil refineries, in this country at least, are more than capable of producing group II and Group III base stocks needed to make high quality synthetics, They
ALL know how to make oil from base stocks, the only real differences in any refiners oils, boils done to the
additive packages that are used in their oils.
Ps...Valvoline chemists told me the reason Valvoline does not make a full synthetic for 2 strokes is because it is a small niche market that Amsoil has already cornered, they see no reason to compete in that market as they also said that Amsoil synthetic is the best oil in the 2 stroke market.
Additive Pkgs make or break an oil company, just ask Quaker State, once the most preferred oil on the east coast of the US, UNTIL, they screwed up the additive pkg which resulted in the oil turning almost into a solid and ruined many, many, car engines that QS had to pay for which almost shut them down for good...Now-a-days, you next to never here about Quaker State oil after this fiasco, The brand name never recovered from that one mistake.
www.nytimes.com
In case you didn't know it, Quaker State
IS Pennzoil and Visa Versa, and Shell Pic, AKA, Royal Dutch Shell, the parent company, is the proud owner of both...lol...lol...lol.
Also for your information Texaco owns Chevron which in turn owns Havoline.
Just in case you can't see what I am getting at,
ALL of these oil companies and refineries are owned by huge corporate parent companies that use what you call "saturation advertising".
They are not mom and pops, setting up shop out in the old fields selling oil in Mason Jars to passersby...lol...lol.