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Slightly off topic, but why does the 0W-20 have higher Noack than 5W-20? Have seen this before where 0W-20 usually looks like a superior product.

They tested Noack range of 15-30%, API SP has a max of 15%, so it sort of seems irrelevant. But point taken.

Do you feel pretty confident that you fixed the issue that caused it to fail in the first place?

Jaco or similar, but I would go with analog reading. Don't want to worry about batteries.

Tick above the lower hash is properly filled, no? They probably fill a set volume.

This. No where has Valvoline claimed that the cleaning is so significant that you need to do something different. They have just about stated the opposite that it is meant to be a slow cleaning so as not to introduce problems.

At 15PSIG the boiling point of water is 257F.

Knowing where you live is important and what the minimum temperatures it will see. Bottom line is that straight water is a better heat transfer medium than an antifreeze mix. For example in FL I can use 30/70 all year long and not bat an eye. And that's probably the lowest you would want to go...

I have looked into it and it seems economical if you have the prowess to install yourself. And installation off the roof seems to make more sense. IE: ground Payback should be 5-7 years in that case.

Agree with this. Doesn't seem PEA is used in Diesel. Power Service Diesel Kleen has almost identical chemistry.

Likely No. It would likely fall under petroleum distillates, or if related to an existing additive you couldn't distinguish between them.

Agreed, this doesn't look right.

Its not top tier and doesn't make any claims as far as detergency. Otherwise the quality should meet all expectations.

I don't think that is true. Same Bypass as the Ultra as far as I understand. And flow is just a gimmick, probably makes no difference.

Good video. (y) I'm sold. They confirm there's a proprietary ingredient, and seem to claim that they developed it. They also seem to claim that the cleaning was intentionally slow so as not to cause other issues, hence the 4 oil change claim. Makes sense on paper.

Startron - FUEL SYSTEM & INJECTOR CLEANER: Polyether amine 10-25% Seems fine to me if the price is right. Although the treat rate seems pretty weak. To put it on par with others you probably want at least 1oz/3gal. Here is a post on treat rate and concentrations from a while ago...

How are you supposed to follow these directions: APPLICATION: Pour the compound into the oil filler neck of a non-working engine, warmed up to the operating temperature. In case of severe engine contamination, for deep cleaning of its oil system to the level of technical purity and for...

Anytime I've used a dawn alternative i've been unimpressed to say the least. But yes, gain is disgusting.

Ehh maybe, but did they fulfil their contract for service? Should strangers be re-delivering parcels? Will they refund shipping costs without hassle?

Nah, FedEx has lost their way. Very unreliable. I'd ask them where it is/who signed for it and let them foot the bill for whatever the item was.