53' Stude's VOA- Carquest SAE 40

[SR5]

Link to a VOA of Supertech SAE30 API SG / CF-2.

https://bobistheoilguy.com/forums/threads/walmart-supertech-sae-30-cf-2.350689/

And associated talk on it

https://bobistheoilguy.com/forums/threads/cf2-enigma.352135/

 

[SR5]

I did my oil change yesterday on the 2006 GM-Holden (Opel) Astra, the 1.8L H series Astra.

Out: Castrol Magnatec 5W30 SN & A3/B4 full synthetic (Group III) & Repco Z154 filter.

In: Penrite SAE 30 monograde (Small Engine - mineral) & Valvoline V06 filter.

OCI = 11,600 km / 7,209 miles / 9 months

SAE 30 Monograde is API SG/CD, non-friction modified, VI = 113 (Group II) , Zinc = 1170ppm, TBN = 6.5, SA = 0.67%. Colour = red.
The TBN is a bit lower, so I'll probably change a bit earlier at 8,000km / 5,000 miles, while keeping the Valvoline syn-blend media filter in for a second run.

Changed the oil again yesterday

Vehicle = GM-Holden (Opel) Astra (AH)
OCI = 7,400 km / 4,600 miles / 6 months

Out = Penrite SAE 30, monograde mower oil (API SG)
In = Nulon 5W30 Long-Life full synthetic (Dexos1-Gen2)

Filter is Valvoline V06 with synblend media, let it ride a bit longer.

Car went fine on the monograde, nothing bad to report.
It's winter here, down to 5C (41F) overnight, but the coldest I started it was about 10C (50F) when heading to work. It started fine and easy, in my mild winter.

 

[SR5]

Linking to a few more monograde threads

https://bobistheoilguy.com/forums/threads/comparing-30wt-with-5w30.355576/


https://bobistheoilguy.com/forums/threads/single-grade-oil.356910/

 

[Chris142]

Back in the 80's everyone here that I knew was using 20W50.

Same here.

 

[Chris142]

There are probably some folks that would be pretty disappointed by this VOA because they buy SAE30/40 under the assumption that it is chock full of the vitamins and minerals that old engines "need".

They have the same api rating as the multi grades so ya same add pack.