Greetings from Arabia Desert ( SL vs GF-5)

[Brave_Heart]

Gentlemen,

I'm currently using Motorcraft Synblend 10w-30 GF-5 ( same as the US) . So far, there is no other oil in our market with GF-5 approved specs except ACdelco 10w-30 conventional oil.

Been following a debate in an Arabic car enthusiasts forum, where a guy posted that Castrol GTX is better than Motorcaft blend

. Bear in mind Castrol GTX here is conventional, SL spec and not approved by API.

He claims he is a chemical engineer with lots of certifications and experience and working in a big Lubricant company, and knows the secrets of motor oils.

I just find it hard to belive: how can an approved GF-5 SN blend, be worse than a conventional SL un-approved oil ?

So my question is : IS it Possible ?

here is a pic of GTX sold here form there ads

this is the company that gives the base stock to Castrol, it is conventional base stock.

http://www.luberef.com/Runtime/Products.aspx?pid=MgA=&sid=MgA3AA==



Thanks in advance

 

[dave1251]

I just find it hard to belive: how can an approved GF-5 SN blend, be worse than a conventional SL un-approved oil ?

The best comment I can make is the sum of the chemistry of a PCMO is more important then a couple individual components much like a complete automobile is more important than just the drive train. That being said I do not have any data on the Castrol that you are comparing your motorcraft.

 

[HK_Ace]

I doubt this is true. Motocraft is an excellent oil and while Castrol is too, it is not synthetic in any part and I bet there is a lot of fake Castrol in that market as well. Stick with the Motorcraft!

 

[artificialist]

The Castrol would be better if you have an old OHV engine with flat lifters. 10w30 SL oil was allowed higher ZDDP when compared to 10w30 SM or SN oil.

If you have an OHV engine with roller lifters, a SOHC engine, or DOHC engine use the 10w30 Motorcraft synthetic blend.

 

[Garak]

I could see it being "better" if it were GC or something with ACEA specs. At least it would be "better" for appropriate applications, then.