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Re: Stp
STP appeared on the scene in the mid 1950's and provided an engine oil that probably was a cut above the general dino oil back then. The number of refiners producing lube stock (to make dino oil) has consolidated many fold over the same period. Tighter product specifications and quality control have made dino oil a product you can rely on. Also, there is synthetic lube oils that have even narrower specifications, but I feel that changing dino oil every 3000-5000 miles (including a new oil filter) is adequate engine protection.
In the late 1960's high octane gasoline contained lead and lots of gum forming olefins. Improvements to components that make up gasoline, removal of tetra-ethyl-lead, and better stability additive packages have made significant gains in the last 40 years. All gasolines sold in the US and Canada have good generic additives, and if you like marketing hype, the majors make claims that there gasoline is superior.
There may have been a time that STP offered a product better than the general industry, but I think the gap has closed and STP no longer stands out from the crowd. Sometimes advertising does wonders for sales.
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“Kansas Law Dog” for admiration of “Tombstone”, the movie, and the legend of Wyatt Earp
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