Simple green, full strength?

[Bobbykart]

For engine compartment today, dilute, or not?

[zmcgovern45]

I'll always recommend to follow the instructions on the label... Simple Green recommends diluting it (at least on the bottle I use around the house), but I cannot remember the exact ratio off the top of my head.

[swanicyouth]

I use it at about 25% to clean tools and stuff. It's OK its pretty cheap. For an engine I might use like 40%.

[lyodbraun]

Full strength for tough oil and grease works wonders, been using it for years... Great product...

[Dogfather]

FWIW as per a post this morning on a similar thread Todd H. at Autopiaforums advises against using Simple Green on engines.

[c8n]

wasn't there some issues with Simple Green and aluminum?

[allenk4]

Aluminum - Is it safe to use Simple Green® on aluminum?

When used with caution and according to the instructions, Simple Green All-Purpose Cleaner has been safely and successfully used to clean aluminum. Simple Green All-Purpose Cleaner, Crystal Simple Green® Cleaner/Degreaser, Simple Green Pressure Washer Concentrates, and Pro Series™ Simple Green® Automotive Cleaner have been used on aircraft, automotive, industrial and consumer aluminum items for over 20 years. However, caution and common sense must be used: aluminum is a soft metal that easily corrodes with unprotected exposure to water. The aqueous-base and alkalinity of Simple Green All-Purpose Cleaner can accelerate the corrosion process. Therefore, contact times for unprotected or unpainted aluminum surfaces should be kept as brief as the job will allow - never for more than 10 minutes. Large cleaning jobs should be conducted in smaller-area stages to achieve lower contact time. Rinsing after cleaning should always be extremely thorough - paying special attention to flush out cracks and crevices to remove all Simple Green® product residues. Unfinished, uncoated or unpainted aluminum cleaned with Simple Green products should receive some sort of protectant after cleaning to prevent oxidation.

Frequently Asked Questions

The website suggests dilution of 1:1 for "Heavy- Stubborn Soils/Heavy Grease"

The section specifically on Engine Cleaning, indicates, use fill-strength

Cleaning Tips

Here are some good tips for Automotive Detailing:

Cleaning Tips

[rouxster]

Aluminum - Is it safe to use Simple Green® on aluminum?

When used with caution and according to the instructions, Simple Green All-Purpose Cleaner has been safely and successfully used to clean aluminum. Simple Green All-Purpose Cleaner, Crystal Simple Green® Cleaner/Degreaser, Simple Green Pressure Washer Concentrates, and Pro Series™ Simple Green® Automotive Cleaner have been used on aircraft, automotive, industrial and consumer aluminum items for over 20 years. However, caution and common sense must be used: aluminum is a soft metal that easily corrodes with unprotected exposure to water. The aqueous-base and alkalinity of Simple Green All-Purpose Cleaner can accelerate the corrosion process. Therefore, contact times for unprotected or unpainted aluminum surfaces should be kept as brief as the job will allow - never for more than 10 minutes. Large cleaning jobs should be conducted in smaller-area stages to achieve lower contact time. Rinsing after cleaning should always be extremely thorough - paying special attention to flush out cracks and crevices to remove all Simple Green® product residues. Unfinished, uncoated or unpainted aluminum cleaned with Simple Green products should receive some sort of protectant after cleaning to prevent oxidation.

Because of this, I wouldn't even take a chance. There are too many other quality engine degreasers that AG sells that don't have warnings like this. Just my opinion.

[Coastalf350]

50/50

[scottdevine]

i just used it for 2 engines, full strength straight out of the bottle, nice job, nice product