I like to keep my logistics simple. I use 15w40 Rotella in my '79 Ford F-150 with a 302. I also use it in my '09 Triumph Bonneville. My question is how do you think it would do in my 2000 Focus? It has 175,00 on the single cam engine. I used Valvoline full synthetic 5w30 for the first 150,00 but have tended to use Valvoline white bottle 5w30 since. It leaks no oil and use only a tiny amount in between the 3000 mile changes. Inside of the engine is clean as whistle. I could, based on how the drive train is holding up drive it another 100,000 but unfortunately the rest of the car is falling apart. I just need about another 50,000 and I will be able to replace it. Any thoughts on using the Rotella in this high mileage engine?
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