Engine Oil, synthetic Oil or Conventional oil?

[stangeba]

What Engine Oil do you use in your Monte Carlo, synthetic Oil or Conventional oil?

[stangeba]

Next I may ask what weight you use, 10W30 or ????

[EVC]

Conventional …  

Lucas hot rod oil, 10w30 winter, Lucas10w40 summer…. High zinc. 

[Marks71]

Valvoline VR1 10w40 high zinc. Year round. (California)

[jft69z]

May want to add another category Bruce, Semi-synthetic.

I use Brad-Penn 10w-40 semi-synthetic in the old cars. (Monte has a solid lifter cam in the LS6 454)

Newer LS based cars get Mobil1 5w-30.

[DragCat]

39 minutes ago, Marks71 said:

Valvoline VR1 10w40 high zinc. Year round. (California)

I use this in my blue oval stock engine. I use the "recommended" in my crate 

[cny first gen 71]

I use the lucas hot rod oil, high zinc usually 10w30

[MC1of80]

Rotella 15w40 was using brad penn 20w50.

[Montemedic]

Valvoline VR-1, 20W-50 with high zinc. 

[Chevy Dave]

I always use synthetic in everything, because it promotes lower wear, better fuel ecinomy and better cold and heat protection.  I asked a Mobil Oil Company chemist for a recommendation, he recommended Their 5W40 Turbo Diesel MOTOR Oil. This oil meets the requirements for gasoline engines as well as diesels, and is high in ZDDP. Synthetic oils do not cause leaks, but they can make them worse if they exist.

[cbolt]

Lucas 10w40

[riverdogs00]

Amsoil Z-Rod 10/40

[MC-71]

Valvoline 10w50

is there shelf life on motor oil?

[Sids Monte]

Schaeffer's racing oil - extra znc

Supreme 7000 synthetic plus 20-50W

Engine builders recommendation

[rsorg]

lucas hot rod oil high zinc

[Whons]

I use Castrol gtx 10w30. Can you switch from  conventional oil to synthetic without any trouble?

 

[cny first gen 71]

1 minute ago, Whons said:

I use Castrol gtx 10w30. Can you switch from  conventional oil to synthetic without any trouble?

 

Usually can with no trouble but synthetic oil will find any oil leaks you have much easier then conventional oil. It don't cause Leak but it will find them.

[stangeba]

I went to an auto parts store and it was difficult to find regular style oil but there were tons of synthetic oil on the shelves.

I didn't notice (or look for) the price difference?

[EVC]

2 hours ago, stangeba said:

I went to an auto parts store and it was difficult to find regular style oil but there were tons of synthetic oil on the shelves.

 

I get the Lucas or Valvoline VR1 from Amazon. I try to keep enough in my garage for two oil changes... The Zinc additive doesn't work as well ,so I always get the oil with Zinc…. I'm sure others will disagree, but that's my opinion. Oils with high detergent defeat the purpose of the additive. 

Ed C.