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info on oil zddp levels in 10w/40 oil if looking

D

Dave928

New member
After much searching around on Semi synthetic oil Zddp / phosphorus protection levels etc and how low a lot of modern 10w/40s are in it,
Comma eurolite 10w/40 semi has 0.18% zddp (1800ppm). API SL. (15w/40 even more!)
They must be the only company that lists this info properly on they're website ! A quality oil at a sensible price.
Mobil 1 10w/40 contains a lot less so it seems than the equiv Comma. Around 850ppm which is too low. (1200ppm about right)
The Comma is what i'll be using next.

Fully synthetic levels can be good, as are some 15/50, 15/40 and 20/50. But this is not what I want.

Quantum Synta levels are adequate but it didn't seem to run as well as the magnatec 10/40 did in my engine.

Jubious on the API SM and newer SN spec so watch out for premature engine wear on those oils. Its all very confusing and my head has been spinning !
 
I stressed over this for a while.

A few people in the US sites are debating that other allowed ingredients have replaced the low zddp levels therefore saying that although one could be low on zddp it could actually provide better protection than another with high zddp.

I dont know enough to comment but would be interested what other comments are.

Bob the oil guy is a good website.

Fuchs titan pro is also meant to have good levels but isnt cheap!
 
Yes I read about that too.

I've even bought the zddp additive for peace of mind (and the car became slightly quieter with it) but If a suitable blend can be bought there's no need for this.
 
ZDDP is a boundary lubricant, meaning its the oils last line of defence when it becomes too thin to provide separation between two surfaces. Its been a common additive since the 60's as its cheap to manufacture yet pretty effective. Modern oils have reduced levels to protect cat converters, they have other boundary lubricants added instead, molybdenum and boron are two. Both probably work better than ZDDP but are more expensive to produce, ZDDP isn't exactly the holy grail of engine protection the internet seems to have given it, more modern boundary lubricants and friction modifiers may work better. Ideally you'd want good levels of ZDDP (1200-1300ppm) and moly in an oil, the trick is knowing what oils have what, its not easy.

I would be wary of ZDDP additives, as too much can be harmful and you may be doing more harm than good. (If you dont know exactly how much is already in an oil how can you know how much to add?)


Edd
 
The Comma appears to be ACEA A3/B4 rated so should be decent enough. If its the ultimate in wear protection your after Millers have now extended their Motorsport Nano tech to their road car oils. Its a 10W40 semi-synthetic called Millers Oils NANODRIVE EE 10w-40, more expensive than your average semi but Millers boast 60% less friction and 42% less wear compared to other semi-synthetic oils. Millers are a British company that are leading the field in oils utilising the latest friction modifiers and have won several awards in motorsport technology.

Millers Oils NANODRIVE EE 10w-40



Edd
 
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