Like many, I've noticed and mentioned numerous positive GC qualities and effects in the past. Most notably, reduced valvetrain noise in 2 of my vehicles, smoother engine operation and reduced vibration in a 3rd, as well as better mileage. And I know that there has been a fair amount of positive scientific and subjective threads written on the subject.
But, I noticed something else yesterday while changing my oil that really made me take notice, and it's not a scientific evaluation by any means.
I was doing an oil change after 10,000 miles of GC and installing a new Wix gold filter on my 3.3 GM motor.
When pulling the pan plug out, I had a small amount of oil spill on my fingers. What amazed me was how slippery, viscous and full bodied the oil still was, even after 10,000 miles. It was also very noticable that as the oil was draining from my engine into the oil pan, how, unlike used dino oil, it wasn't watery or weak and used in appearance.
I took a few moments after draining the oil, and really examined it. I also opened a new GC as I was pre-filling my oil filter, and compared the used oil to it. Much to my surprise, it had the same physical charecteristics and almost identical feel and viscosity properties to the brand new GC that I compared it to. It looked and felt as if it could have been safely poured right back into the car for another 10,000 miles.
One thing I had always noticed over the years of changing my own dino oil is how thin, lifeless, and unslippery my used dino oil felt, even after only 4000 miles. Even my used M1 over the years seemed spent after 7000 miles.
I've been changing my own oil, as well as others since the late 70's. In the days, I primarily had been using Valvoline, with positive results. But, I could always tell when the oil needed to be changed, either because of a drop in oil pressure at hot idle, or an increase in valvetrain-engine noise. And the oil always felt like it was used up, usually between 3000-5000 miles.
But, the GC still felt like new oil, drained out like new oil, and has continued to impress me.
I still use Rotella in all my 440's for it's properties, but my newer daily drivers sure love the GC.
But, I noticed something else yesterday while changing my oil that really made me take notice, and it's not a scientific evaluation by any means.
I was doing an oil change after 10,000 miles of GC and installing a new Wix gold filter on my 3.3 GM motor.
When pulling the pan plug out, I had a small amount of oil spill on my fingers. What amazed me was how slippery, viscous and full bodied the oil still was, even after 10,000 miles. It was also very noticable that as the oil was draining from my engine into the oil pan, how, unlike used dino oil, it wasn't watery or weak and used in appearance.
I took a few moments after draining the oil, and really examined it. I also opened a new GC as I was pre-filling my oil filter, and compared the used oil to it. Much to my surprise, it had the same physical charecteristics and almost identical feel and viscosity properties to the brand new GC that I compared it to. It looked and felt as if it could have been safely poured right back into the car for another 10,000 miles.
One thing I had always noticed over the years of changing my own dino oil is how thin, lifeless, and unslippery my used dino oil felt, even after only 4000 miles. Even my used M1 over the years seemed spent after 7000 miles.
I've been changing my own oil, as well as others since the late 70's. In the days, I primarily had been using Valvoline, with positive results. But, I could always tell when the oil needed to be changed, either because of a drop in oil pressure at hot idle, or an increase in valvetrain-engine noise. And the oil always felt like it was used up, usually between 3000-5000 miles.
But, the GC still felt like new oil, drained out like new oil, and has continued to impress me.
I still use Rotella in all my 440's for it's properties, but my newer daily drivers sure love the GC.
