Its not about the performance out of the bottle, its the performance at the end of the oci. Things aren't binary where the oil suddenly turns into a pumpkin on a certain mile. It degrades as a scalar. So if the oil is bad in your mind at 7000 miles, what about at mile 6999 or 6998? What about mile 7001?
You are paying for that end of oci improved performance.
As noted the perspective works both ways. For the total cost of operation of the vehicle over thd oci, whats an extra $5 for thr full synthetic oil which maybe will pay for itself in fuel by staying closer to out of bottle performsnce during the last 1000miles of your oci.
If you can move to the annual oci that's a benefit. Even if you don't want that, it give you more flexibility if you get busy and can't do an oci on schedule; that future flexibility option might be worth $5.
You are paying for that end of oci improved performance.
As noted the perspective works both ways. For the total cost of operation of the vehicle over thd oci, whats an extra $5 for thr full synthetic oil which maybe will pay for itself in fuel by staying closer to out of bottle performsnce during the last 1000miles of your oci.
If you can move to the annual oci that's a benefit. Even if you don't want that, it give you more flexibility if you get busy and can't do an oci on schedule; that future flexibility option might be worth $5.
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