1997 Chevy 1500 PU. Only 25K miles. 4.3L V6. Mint condition. This truck has been in storage for the past two years. Double dose of Stabil (per their instructions)in the tank. Mobil 1 10-30 and fresh oil filter before storage. Truck has been started and revved to 2000 RMPs, monthly for 20 minuits to reach operating temps. Question: It will be soon be driven, all highway mileage, at Interstate speeds, 70 mile round trip daily, in the Texas heat. I am trying to decide between PP 10-30 and Valvoline Synpower 10-30. I will try to go at least 7500 OCI's... Your thoughts? Thanks.