New Castrol GTX HM oil, with reduced phosphorus

[addyguy]

Just recently, we started getting Castrol GTX HM bottles with new labels and design on them at my store.

The wording on the back now says (paraphrasing) "...Phosphorus is a know catalyst poison, so to reduce damage to emissions systems, new GTX HM has reduced levels of phosphorus, below industry mandated levels, without sacrificing engine protection..."

I find it interesting that Castrol is taking this route, when many other HM oils (QS, Mobil 1) deliberately use HIGHER levels of anti-wear additives as the route to protect older engines. I wonder just how low the phosphorus level on this oil is?

What do you think?

 

[HerrStig]

I think Castrol found an alternative add pack.

 

[Ducman]

Originally Posted By: addyguy
What do you think?


I think it's interesting, but a VOA could point the way forward or at least shine some light on it.

 

[jorton]

Check the pds for the HM oil. I think the zinc and phosphorous are the same levels as GTX. If the HM oil is supposed to preserve catalytic converters in older cars I would think It should have lower levels than GTX has.

 

[Garak]

Is the latest GTX HM in Canada SN/GF-5? I haven'[t checked for a pretty significant period of time.

 

[buster]

Valvoline has done the same with MaxLife and has for awhile.

 

[BikeWhisperer]

Fancy way of saying their HM oil is API SN rated (some high mileage oils are SM or even SL)

 

[buster]

^ Right.