Originally Posted by gfh77665
Originally Posted by OVERKILL
It's full of soft metals that temporarily fill in scratches, scars and voids in metal which would increase compression. It is NOT, despite advocacy to the contrary, a long-term maintenance product for high mileage engines, it's a product designed specifically to bandaide damaged engines and provides zero value in an engine that is mechanically sound, regardless of mileage.
Its not designed for "damaged engines" nothing out of a can can fix that, and Restore does not claim that at all.
Its is for worn engines. A 250K mile engine may very well be "mechanically sound" but worn. For example my roof is 15 years old, but no leaks at all. It is "mechanically sound" but is worn. Not hard to understand this.
If its temporary, then why wouldn't it be added at each change? Thats exactly the instructions it gives. Can you explain how a product that "increase compression" (your own words) is NOT beneficial?
You've obviously got skin the game, being an advocate, so your position here is not going to be unbiased.
An engine with reduced compression due to scarred bores is not "mechanically sound". You might want to call it worn, but the reality is that it has experienced damage. Restore works, as I already explained, by filling those voids with soft metals, which increases ring seal and thus raises compression. To use your roof analogy, let's say your roof IS leaking, but very little, and you go up and dump some tar on the spot that's leaking. It's going to stop leaking, but it will eventually develop another leak because the roof is damaged and needs replacement, so you can keep dumping tar on it, but it is only buying you time. This is not a maintenance plan, this is a bandaid to deal with a roof that is at the end of its life, Restore operates on the same premise with engines.
I've torn down numerous high mileage engines and those that were subject to good air filtration and maintenance will have bores in impeccable shape. The bores on my most recently owned 302, which had 346,000Km on it, were immaculate, no wizard in a can was going to make it better, and it still had factor spec compression. On an engine with bores in good condition, there is nothing to "Restore".
On the other hand, on an engine that's been neglected, may have significant blow-by and lower than spec compression due to bores in less than perfect shape, Restore isn't going to undo the damage caused by neglect, but it may reduce the blow by enough for a time to allow somebody to save up to buy a new vehicle, or stop oil burning for long enough for the same reason.
The product provides no benefit for a mechanically healthy engine, regardless of the mileage on it. There is no benefit of having soft metals comprising a significant portion of your lubricating oil if you aren't trying to temporarily mitigate damage. The reason the product needs to be added at every change is because those soft metals eventually get consumed by the engine and make their way out the exhaust, so you need to refresh them. If burning soft metals doesn't sound like a great long-term plan, particularly for emissions components, you'd be correct. But, at the mileage, age and condition of the engine that most would be adding this product to, emissions warranty would be long over and nobody with a 20 year old vehicle burning oil is going to be able to make a case that their catalytic converter suffered death by Restore, nor would they bother, since they were already trying to drag it that extra mile by pursuing that route in the first place.
