Originally Posted By: skyship
The Edge 5/30 is an oldish product and most folks will be looking more at their 20 grades for new petrol cars or 40 grades for diesels.
Volvo did a real good study of the different oils some years ago and for their diesels the winner was Castrol Magnetec 5/30 or 40 and Edge 5/30 or 40. They were the most expensive major brand standard oils at the time the contract was signed and are still expensive.
The add pack was changed to allow more efficient use of ZnDDP additive, by reducing the Calcium level to about half the normal figure and replacing it with Magnesium based detergents. That change was interesting because the Zinc reductions required for the new DPF oils (Acea C3 et al) do result in increased wear, but the change in the Phosphorus/Zinc combination resulted in an improvement in the last few years at lower total Zinc levels.
Remember that much of this is completely irrelevant to the tests at hand. The "A" in PQIA stands for America. They are testing oils for SN/GF-5 compliance. An A3/B3 or A3/B4 or 40 grade oil wouldn't have made it into testing for SN/GF-5 compliance in the first place.
The Edge 5w-30, whether we like the product or not, is SN/GF-5 compliant and certified (and dexos1 now too, and has been dexos1 in Canada for a while already). Heck, it might even be A1/B1 and A5/B5 for all I know. In any case, calling it "oldish" is a disservice to the testing that was done and the standards that it meets. It's actually certified to just about all the latest standards for its target market, notably SN, GF-5, and dexos1. DPF compatibility and ACEA C series certification are absolutely irrelevant.
For those mentioning the NOACK on PU, I have to admit I was skeptical about the claimed NOACK, but now I'm a believer. There's nothing wrong with being skeptical. I've caught some whoppers in data sheets before and my skepticism was justified.