High zinc oil

[blufeb95]

Regardless of zinc, which modern engine takes 20w50?

The most modern car that I can think that recommended Xw50 was the Corvette recommended using Mobil 1 15W50 for track events up until 5 years ago or so.

 

[STREETFIGHTER50]

So is Castrol GTX still the high zinc conventional choice? What other conventionals from Walmart are considered high zinc, not including the HDEO’s?

 

[blufeb95]

So is Castrol GTX still the high zinc conventional choice? What other conventionals from Walmart are considered high zinc, not including the HDEO’s?

None that I know of, they clearanced the GTX Classic off, now the only higher ZDDP PCMO still on the shelf at Walmart that I know of is Mobil 1 15W-50.

 

[subyski]

So is Castrol GTX still the high zinc conventional choice? What other conventionals from Walmart are considered high zinc, not including the HDEO’s?

Valvoline Vr1 is available at some Walmarts.