I spend about $1,000.00 per year on lubricants and fluids, so I like to go with the outlet that has good service, prices and a friendly staff.
Right now I'm buying a lot of Pet Can products, but sometimes their prices suck.
Chevron's prices are slightly better, but sometimes I wonder about their oil's cold flow numbers, and the product selection is sometimes limited.
The Esso guys are very ambitious, prices are better, products are good, and the guys put up with our train whistle blowing all day long, up to 30 each way per day.
The Shell guy helped with lubricant selection for the steam engine (CN 2141) just retired and I have not met the new owner.
Costco has 20 litre pails of Castrol Super RX 15W40, now CI-4 rated $8.00 cheaper than the other guys listed above.
2 stroke MX bikes and 115 HP outboard: Shell Advance ultra at 38:1
2 stroke chain saws 85CC Husky Aero Shell 15W50 or Chevron 20W50 aero at 40:1
Bar lube and air filter oil: Non-drip 150, vis-tac, ect.
Camshaft assembly lube: Chevron moly max (5%)
Auto wheel bearings: Pet Can Precision Gold, its about a 1.5 LBCG.
Motorcycle chassis, bearings, headsets Pet-Can OG-1, Calcium Sulfonate. GC-LB
Bicycle applications, OG-0, or Gold EP 00.
MX 2-stroke transmissions Eaton: PS-081 CD 50s.
MX 4 stroke transmissions/engine: Cat synthetic TO-4s
Road bike wet clutch/trans/engine HDMO CF-2s 40s and 50s.
MX forks R+O 15-32s, shocks; synthetic compressor fluids/ R+O blend to an ISO 17-22ish.
Auto and PU rear-ends the cheapest 80w90, and 75W90 (PC group II+) or the expensive Chevron RPM 75W90. I ain't putting good stuff in a beater.
Power steering pumps; AW32s or ATF.
Chassis lube: moly something.
Car an PU engines: HDMO CI-4s 10W30, 0W30s 5W40s and 0W40s for cold weather either Delo, Duron, XD-3, and/or Rotella.
CI-4s 15W40s and CF-2 straight grade 30, 40, and 50s for warm and hot weather.
MTFs: All season THFs (GL-4s) where ATF is recommended.
10W30 or synthetic HDMOs where engine oils are recommended, CD50 commercial truck MTL, or GL-5 75W90s that pass A-1 copper strip.
I don't think one brand is any better than the next, although some typicals may be better suited for particular applications.
That is where customer service comes into play.
(not dial a friend, lubricant information and tech lines are not ment for oil nut-cases and chat-talk)