Awhile ago, I browsed through a lot of UOA's for EcoBoost / GTDI engines and found what I thought was a trend. Most synthetics wouldn't really handle more than 7500 or so miles, while the Amsoil SS and Mobil 1 EP's could go about 10k miles before the TBN got ridiculously low, or viscosity thinned out too much. I personally ran the cheapest non-synthetic 5W-30 (that met the Ford required spec) in my EcoBoost 3.5 and had UOAs done at 7k-7.5k miles and Blackstone didn't recommend going over this because of the viscosity (TBN looked OK).
I was curious if anyone else has seen a trend of longer OCI's for the EcoBoost engine using various types of oils. The reason I ask is if I change the oil every 7500 miles with a decent OTC synthetic (Pennzoil Platinum / Valvoline Syn Power, etc...) versus 10,000 miles with Amsoil SS, there is a huge cost delta for using the more expensive Amsoil. I've been running Amsoil SS 5W-30 in the girlfriend's cars, one of which has the GM LTG 2.0 GTDI engine because she prefers Amsoil. I've normally used OTC synthetics.
But doing a bit of math, I'd have to change the Amsoil SS in my EcoBoost engines every 15,000 miles to break even with the cost of changing OTC synthetics every 7500 miles, and I've never seen any UOAs for Amsoil in a GTDI above 10k miles that looked ok.
I kind of want to know if it really is worth it.
I was curious if anyone else has seen a trend of longer OCI's for the EcoBoost engine using various types of oils. The reason I ask is if I change the oil every 7500 miles with a decent OTC synthetic (Pennzoil Platinum / Valvoline Syn Power, etc...) versus 10,000 miles with Amsoil SS, there is a huge cost delta for using the more expensive Amsoil. I've been running Amsoil SS 5W-30 in the girlfriend's cars, one of which has the GM LTG 2.0 GTDI engine because she prefers Amsoil. I've normally used OTC synthetics.
But doing a bit of math, I'd have to change the Amsoil SS in my EcoBoost engines every 15,000 miles to break even with the cost of changing OTC synthetics every 7500 miles, and I've never seen any UOAs for Amsoil in a GTDI above 10k miles that looked ok.
I kind of want to know if it really is worth it.