Best Engine bay cleaner

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muscleman

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Hey guys, I was just wondering in your opinion what is the best engine degreaser ? something economical that will destroy oil and grease but not stain the engine block or stain/fade any rubber or black plastic pieces under the hood.
 
Iv heard good and bad things about this and have used it before but not in the engine bay do you need to dilute it?
 
Another vote for purple power, and depending on how dirty your engine bay that is how you dilute the product
 
jamesboyy said:
Another vote for purple power, and depending on how dirty your engine bay that is how you dilute the product
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Thanks man! i know purple power is cheap and strong which is definitely what I'm looking for but for example say I don't dilute it. Will it ruin my engine bay ?
 
It wont ruin it but if your engine bay is not really dirty, and you use the product straight it may cause some discoloration or the black plastic parts, but after applying a dressing it will disappear
 
jamesboyy said:
It wont ruin it but if your engine bay is not really dirty, and you use the product straight it may cause some discoloration or the black plastic parts, but after applying a dressing it will disappear
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Ok, cool so what dilution ratio would guarantee not to spot or stain anything...I know you cant guarantee anything but what would be your best guess.
 
twobucket said:
no mention of OPC?
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Yeah, I love it, but it's usually too expensive for most, especially on the engine bay. Optimum Power Clean is usually reserved for paint, interiors, etc - some place that is sensitive. For engines, most go with a cheap OTC solution.

That being said, OPC at full strength should give good cleaning power and not discolor any plastics. They advertise it as the safest out there, so I certainly wouldn't be worried in the engine compartment.

Whatever you go with, maybe do a test spot to see if there is any discoloration, that way you know before doing the whole bay. Good luck and happy detailing!
 
Got to try some Detailers Pro engine cleaner. Totaly safe and a great product!
 
Gokite said:
One part PP to seven parts water? Or the opposite?
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I've noticed this question is asked a lot around here.

It proper way to write it is in our context is 1:7 ratio. This is kind of the bartender/mixologist way of writing ratios as a part-to-part ratio which is not exactly the same as the scientific world which uses final volume for the last ratio number.

The first number always being the product, the second number always being the diluting agent (diluting agent=water in almost all of our instances).

1:7 is then 1 part purple power to 7 parts water for 8 parts total.

In a 16oz container that's 2oz PP to 14oz water. For a 32oz sprayer, double both. Those are both very common sprayer container sizes available at local hardware stores and online which is why you see that seemingly odd ratio thrown around so much here on AG.

Should you see those numbers in the ratio formula reversed, it's always prudent to ask specifically, as the poster may not be aware there is an accepted system to how to write the ratios correctly
 
I saw a youtube vid stating 1:1 when cleaning the engine with PP, so I wasn't sure.
 
Spray Nine, it's strong enough to clean even the worst engines yet gentle enough for the plastics, will NOT damage the plastic nor paint for that matter.
Costly though, $$15.00 for a 32oz bottle but worth it IMO
 
I dilute it 50/50 and use a pump sprayer, are you using a pressure washer to clean the motor?
 
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