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For a newer 4Runner with the A750-F 5-speed that calls for Toyota WS. Both fluids look good on paper with maybe a slight nod to Amsoil, and I can get 5 gallons delivered to my door of either for nearly the exact same cost of $294 (yes, I used the BITOG discount and have an Amsoil account). They...

This is the standard non-limited slip version. Born on date of 02/28/2018. Crazy VI of 222! Technical Data Sheet link

Born on date of the oil is 1/25/2018 and it's made in France. Specs from Mobil to compare against: Viscosity, cSt (ASTM D445) 72.8 @ 40ºC 12.1 @ 100ºC Viscosity Index 164 Sulphated Ash, wt% (ASTM D874) 0.6 HTHS Viscosity, mPa•s @ 150 ºC (ASTM D4683) 3.58 Pour Point, ºC (ASTM D97) -45...

Title says it all- why does Amsoil tend to thicken up over time more so than other synthetics?

Hello! Have a newer Xterra with the 4.0L VQ engine. I've been hearing that the VQ's prefer a little thicker oil. Manual states the now common 5w-30 but also lists either 10W-30 or 10W-40 for temps over 0deg. Well, I generlly prefer thicker oil films for better protection and fuel milage is a...

I have an '06 Xterra that uses an Amsoil EA013 filter- which is TINY! Looks like a much larger EAO36 will physically fit but it has a different bypass psi rating. Original is 8-11psi and the larger is 11-17psi. Neither filter will ever see more than 8000 miles. I'm running either 10W-30 or 5W-30...