Odd... every time I have emailed Valvoline, they always have replied to me stating to follow my vehicle manufacturer's recommended oil change interval. I believe they do this for liability reasons.
I have never heard of Valvoline, or any other oil company, stating to change their product at 4...
Out of curiosity, what temp range do you see? I feel like your cold is COLD.
I am located in Northwestern Tennessee, and we see a max range of about 105°F to 0°F (40°C to -17°C). Thankfully, we have extended spring and fall weather, so those extremes are short lived.
It is most certainly getting to be a hit or miss item in my area, especially in the 5w30 flavor. I have 3 Walmart locations in about a 10-mile radius from me and about 50% of the time the Valvoline Restore and Protect shelf is empty while everything else has plenty of stock on the shelf.
Side...
8th year of Laboratory Engineering at a large domestic manufacturer's propulsion laboratory. Mostly engine/power train R&D along with agency certification.
Like said above, increasing the pressure will increase the center wear. Likewise, decreasing the pressure will decrease the center wear.
If you feel like you're having abnormal center wear, decrease the pressure by 1 to 2PSI at time until you find the wear pattern you are looking for. A quick...
It's the sweet tea effect.
By sweet tea, I mean southern sweet tea made with 2+ cups of sugar per gallon. If you've lived in the south, you know how sweet this is. Hence why the snowbirds skew the data in Florida as compared to the rest of the south.
It absolutely will not. No oil will correct faulty parts.
I went down the same rabbit hole with my 2025 Jeep Gladiator hoping to avoid the cam eating issue. After about 9k total miles and HPL Premium Plus 0w30 from brand new, the cam failed in spectacular fashion.
I'm running Valvoline Restore and Protect 5w30 and Carquest Premium filters in my 2025 F150 with the 5.0 and it has been preforming really well. I dumped the factory fill at 500 miles with subsequent changes at 1.5K, 5K and 10K. Oil analysis at each has shown very low wear numbers and the truck...