First, let me define "older vehicles" - any multi-port injected vehicle older than 2010ish. I have been noticing that the red bottle MaxLife and most other syn-blend or conventional type oils don't meet the Dexos 1 Gen 2 certification - barring some exceptions. I know that a big reason for the Gen2 spec was protection against LSPI in DI engines. According to the GM marketing machine, it also provides these benefits (pulled from the ACDelco site):
"Advantages of dexos1 Gen 2 Full Synthetic Engine Oils:
Helps maintain maximum fuel economy
Reduces sludge and improves engine cleanliness
Significantly reduces low speed pre-Ignition
Offers superior wear protection
Reduces turbocharger deposits
Improves oxidation control
Is a Full synthetic oil without the full synthetic price."
So back to my original question - If I'm a regular user of these types of oils, should I care that red bottle MaxLife (or similar) doesn't meet the Gen2 spec in a non-DI vehicle? Personally, I'm running full syns at the moment, but I've used the high-mileage blends in the past. If I'm considering this type of oil for my older vehicle, is there a tangible benefit to the upgraded Gen2 formulations, or is it just marketing fluff?