Sludgy 1990 F150 5.0

[cbrf3]

We have not used cleaners in the oil, just using straight oil. The Valvoline has maybe 300 miles on it and is the first time using it.
Got most of the oil in the past for this truck at a great discount or used rebates.

 

[Japanese]

We have not used cleaners in the oil, just using straight oil. The Valvoline has maybe 300 miles on it and is the first time using it.
Got most of the oil in the past for this truck at a great discount or used rebates.

That's great!
Keep using the Valvoline Restore & Protect for at least 4 oil changes or total of 20,000 miles. The motor oil price recently went up but you can stock up at Meijer if this sale is available in your area. This is the best price you can found right now.
https://www.meijer.com/shopping/product/valvoline-restore-protect-full-synthetic-5w-30-motor-oil-5-qt/7413007190.html

You can check Walmart out as well, but there the price was $36 for 5 qts.