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Here's the report for the second fill of VRP in my 190,000 mile Jeep Wrangler. I communicated with Blackstone regarding their concern regarding Potassium level and mentioned the vehicle had a leaking oil cooler replaced. I did need to add a small amount of coolant prior to replacing the oil...

@STMech I’m experiencing the same engine response to VRP that you are. My 2014 Jeep Wrangler Unlimited has the 3.6 V6 engine with 186,000 miles. It runs quieter and smoother with this oil than any I’ve run previously, and I’ve always used a high quality synthetic since new. Prior to running...

@swrve My intent is to stay with it. When Pennzoil Ultra came out it was promoted as an oil that kept engine components clean. I will say the throttle body of each vehicle I’ve run it in always stayed amazingly clean. Oil vapors recycled through the PCV system didn’t gunk up the intake and I...

FWIW, my 2014 Jeep with the 3.6l engine currently has 186k miles on it. Through most of its’ life I used 5w-20 Pennzoil Platinum or Ultra Platinum. At about 150k miles I changed viscosity to 5w-30 Pennzoil Ultra Platinum and curiously the fuel economy increased. Last year I tried Valvoline...

2014 Jeep Wrangler Ultimate purchased new June 2014. 177k miles. Oil and filter typically changed when the oil life monitor indicated 20% oil life remaining (about 6k to 7k miles on the oil). Oils used have been Pennzoil Platinum and Ultra Platinum 5w-20 from new to around the 140,000 mark and...