by Robert Sanborn on Fri, Feb 26, 2010, who was a member of the STLE Society of Tribologists and Lubrication Engineers for 15 years.
Whenever a new motor oil warranty standard is released by the oil industry, which is based on specifications required by the Original Equipment Manufacturers (OEM) such as Ford, General Motors, Chrysler, etc. marketers begin selling the improvements over the last specification or in this case GF-4. This exposes the pitfalls of GF-4 and the problems that millions of car owners are experiencing with their engines in their vehicles. The results are out and there seems to be a real problem with GF-4 and cleanliness. Here are the improvement areas:
Engine Sludge Protection
E85 Rust Protection for Ethanol
E85 Emulsion Retention for Ethanol
Emission System Durability
One of the main areas there was no improvement in wear protection. Imagine that the OEM’s still want their cars engines to wear out so you will buy a new vehicle.
The Group I petroleum base oils are being phased out as synthetic motor oils will be the future.
So is everything good on the horizon?
Well, maybe not as General Motors doesn’t like the new specification so that they have designed their own called dexos 1. Yes that is how its spelled with lower case letters. Their main focus is a full synthetic requiring low volatility. The dexos 1 motor oil is to come out slightly ahead of GF-5 which debuts in October for official licensing.
In conclusion, if you want to know the problems of motor oil just look at a new specification when it is proposed as that is what the oil guys must address. SFR has been putting more additives in their products for 20 years, but when you only have one specification such as GF-4 there is no incentive to improve beyond that. Too bad, if you want maximum performance then you must turn to aftermarket additives to do the job.