My engine oil is green color. Its normal?

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SUMMARY

The discussion centers on the observation of green-colored oil after an oil change in an outboard engine. Participants confirm that certain brands of motor oil, such as Amsoil and Stihl, are naturally green when new, and this is not a cause for concern as long as the oil remains clean. The conversation highlights that the color variation is due to specific additives and does not indicate a problem with the engine. Users emphasize that as long as the oil is not dark or sludgy, it is safe to use.

PREREQUISITES
  • Understanding of outboard engine maintenance
  • Familiarity with motor oil brands and their characteristics
  • Knowledge of oil change procedures
  • Basic awareness of oil color indicators and their implications
NEXT STEPS
  • Research the properties of Amsoil and Stihl motor oils
  • Learn about the additives that affect motor oil color
  • Investigate the differences between engine oil and gear oil for outboard motors
  • Explore best practices for disposing of used motor oil responsibly
USEFUL FOR

Outboard engine owners, marine mechanics, and individuals interested in understanding motor oil characteristics and maintenance practices.

vtr1005
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today i did a oil change on my outboard engine. i found out the oil is green, its normal? If yes, why the oil will be green color? because i fill the new oil is golden color.
 
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Some brands of motor oil are greenish colored when "new". Maybe the previous oil change used one of those.

If the old oil looked "clean" (i.e. not dark colored sludge) I wouldn't worry about it.
 
I agree w/ AlephZero. I've used very greenish oil and as long as it is clean there's no problem. I don't know what goes in it that makes it greenish, but not to worry.
 
Klotz is red, Amzoil is green, Stihl oil is bright green, Echo oil is gold, Husqvarna oil is blue.
Oh those germans..Stihl says their green oil is 80%biodegradable in 21 days...good marketing ploy..me ... i save my old motor oil until Earth day when I have a huge bonfire. Old motor oil is great to start fire for my old race car tires...
 
Last edited:
vtr1005 said:
today i did a oil change on my outboard engine. i found out the oil is green, its normal? If yes, why the oil will be green color? because i fill the new oil is golden color.

If it is for the lower unit then they usually take gear oil which has a greenish hue (and stinky!). Are you perhaps talking about that or we discussing the engine oil?
 

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