So the counter question I will pose to you:
Why would an oil get to that varnish level to begin with?
Here’s some pictures of a 2003 CAT C15 currently getting rebuilt in my shop. It has 1.2-1.3 million miles on it. It has not been rebuilt before, we’ve owned it for approximately ~900,000 of those miles.
Mind you, yes a diesel engine. But, no major varnish build up on any of the parts.
Varnish build up shouldn’t happen if you’re changing your oil regularly, using on spec oil, and keeping your vehicle in decent working order. You might have a little more build up if you’re using super cheap synthetic blends all the time.
However, judging by the posts here, if you’re using basically anyone’s full synthetic and changing it regularly. You’re not going to see varnish happen over the life time of the engine. You’re going to see a metal fatigue issue first, or a contamination issue happen well before you see an oil based failure. That’s why I posted these pictures.
Varnish isn’t an issue in diesel engines, after a million miles. Why would it be an issue for a car after 100k? Or 200k?
That’s why I called this a wonderful piece of marketing. Because it’s making you believe you have a problem, that they’re going to solve.
This is a problem that in reality for most people, doesn’t exist. 6 months ago at your last oil change, using whatever full synthetic, you probably didn’t stop and think “hey, you know what? I bet I have a varnish problem in my engine. I sure wish I had an engine oil to clean this all up.”
Valvoline sells because of marketing. And it’s fine. On the installer side they have great signage and coupon programs, with awful contracts that lock the installer into gallons and years of contracts because of their marketing. On the DIY side, they market a solution to a problem that doesn’t exist. Again, not saying this is a bad product. I’m just pointing out they’re a great marketing company. And the way you sell a product, is to solve a problem.
Much like Snickers markets their candy bars, they solve the problem of hunger. But we all know that eating a snickers when you’re hungry isn’t the greatest solution, nor is it the best thing for you. Does it work? Yup. Does this oil work? Yup. Do you actually have a problem? Nope.
If you choose to buy this product, cool. It’s a good product. Won’t do you any harm at all. And you know you’re getting something that’s been looked at by an additive manufacturer and a blender pretty well.
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