Walmart oil prices - Ah!

That's wonderful to hear that price support seems to have vanished!
I’ve been through the oil 3 times since the price increase and the QS is always full. Valvoline Restore and Protect was moved to the top shelf. Supply is still not as bad as it was during a stretch of COVID. It will get there but I’m prepared this time.
 
I know the ESP line is the top tier of Mobil 1, just not sure it's chemistry is best utilized in use cases like my 302 (y)
Mobil 1 ESP 0W-30 has about 1% ZDDP:
PHOSPHORODITHIOIC ACID, MIXED 0,0 BIS (1,3-DIMETHYLBUTYL AND ISO-PR) ESTERS, ZINC SALTS
CAS# 84605-29-8
Amount: 0.1 - < 1%
SDS below—2nd page, 2nd table row form the bottom

And b/w 30 and 40% GTL:
DISTILLATES, HEAVY, C18-50 - BRANCHED, CYCLICAND LINEAR
CAS# 848301-69-9
Amount: 30 - < 40%
SDS below—4th table row from the top

Mobil 1 ESP 0W-30 SDS (07/14/2022)
https://seattleautomotive.com/files/SDS/MOBIL%201%20ESP%200W-30_124547.pdf
 
Sadly at my local Walmart Castrol high mileage and extended performance has finally joined the price jump club.

$31.97 for the high mileage
$33.97 for the extended performance
 
I think the Castrol EDGE EP sale will be over soon. At one of my local Walmart stores is almost gone.

IMG_2475.webp
 
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