What brand of 10w30 should I use in classic car

[redgoat]

With the reduction of zddp in motor oils, what brand of 10w30 should I use in my never rebuilt 400 cu. in 2bbl Pontiac engine? I have 125,000 miles and have never had a single issue with my engine since I bought it brand new 46 years ago. It does leak oil in a couple of locations (like the rear main) but does not burn oil. Would a high mileage oil be best. Should I add some ZDDP from Eastwood when I change oil?

Read more: http://forums.highperformancepontiac.com.../#ixzz2L5SmdLSu

 

[skellyman]

Champion Oil in Clinton Mo. offers ZDDP additive as does Edelbrock , look in the local mom&pop type parts store.
Use what ever is your favorite oil.

 

[JHZR2]

Rotella T5

 

[RiceCake]

Yeah, I'd be using Rotella T5, or almost any old-spec diesel HDEO. They tend to be ZDDP loaded.

 

[Doog]

Brad Penn

 

[Rock_Hudstone]

Shell Rotella 10w-30 in the winter, 15w-40 in the warm months. Both available at Walmart for very reasonable prices.

 

[randomhero439]

Originally Posted By: JHZR2
Rotella T5


+1 Cheap and easy.

 

[KCJeep]

Rotella 10w30 should be near optimum IMO, I believe QS Defy might also do okay but the ZDDP levels are a bit lower than Rotella in the 10w30 version.

 

[CATERHAM]

First welcome to BITOG.

The only reason not to use a modern 5W-30 oil is the reduction in ZDDP so I'd suggest QS Defy 5W-30.
The problem with using a HDEO 10W-30 is that it's almost 40wt oil which you really don't need.

 

[Umibozu]

Originally Posted By: Doog
Brad Penn


This!

 

[skyship]

Castrol make some classic car oils, but you would need to look up what was the original oil spec and then contact them for a recommendation. In general terms you should use an oil that includes a high Zinc content rather than use additives.

 

[CMMeadAM]

Amsoil Z-Rod 10W30 Synthetic Oil. It's especially engineered for classic cars, has 1440PPM of ZDDP and has the additional benefit of having a proprietary blend of rust and corrosion inhibitors to protect during storage.

We also use the Amsoil Series 3000 HDD synthetic 5w30 oil in many of our 60's classic cars. It has a nicely high 1380 PPM ZDDP and a 3.5 HTHS.

Check out the Amsoil site for additional info. Excellent oils !

 

[salv]

Defy is a good choice, either in 10w30 or 10w40. The 10w40 version has more ZDDP than the 10w30.

 

[electrolover]

Originally Posted By: JHZR2
Rotella T5

+1!!

 

[SS1970chrysler]

Rotella or Delo 10w-30 would do just fine IMO.

 

[CATERHAM]

Originally Posted By: CMMeadAM
Amsoil Z-Rod 10W30 Synthetic Oil. It's especially engineered for classic cars, has 1440PPM of ZDDP and has the additional benefit of having a proprietary blend of rust and corrosion inhibitors to protect during storage.

We also use the Amsoil Series 3000 HDD synthetic 5w30 oil in many of our 60's classic cars. It has a nicely high 1380 PPM ZDDP and a 3.5 HTHS.

I also prefer HDD 5W-30 to Z-Rod 10W-30 since it's a bit lighter but it's 3.5cP HTHSV still means it's a heavier than spec' oil.
That's why I like the semi-syn QS Defy 5W-30. It's virgin viscosity is more in line with what was originally spec'd for the car.

 

[Reg# 43897]

The Defy option is a pretty good one but I am such a fan of T5 that it would be my choice. I am using that oil nowadays in the lion's share of my applications... I put that ____ in everything!

John.

 

[84zmyfavorite]

Shell Rotella T5 10w-30 would be my choice if She isnt leaking. Any HIGH Mileage 10w-30(GTX HIGH Mileage, Valvoline Maxlife, etc) if she has a weep of oil.

 

[84zmyfavorite]

Drips are gonna mean replacing a seal.

 

[CATERHAM]

The engine was never spec'd for a heavy diesel oil back in the day so why go that route now when a modern high AW additive PCMO of a more appropriate viscosity is available?