When people ask about Oil ....
Road Master
Joined: Jun 2008
Posts: 792
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From: Round-Up City, Orygun
I believe Mobil One hasn't been complete in their answer. Energy conserving additives aren't found in heavier grade oils, such as 15x50 or 20x50. Check the bottles from any company next time you are in WalMart. The energy conserving "Star" symbol is only on the 5 weight or lower oils, such as 5x30.
See attached picture. Look at the circle on the back of each bottle. Note only the 5w30 bottle, on the left, is stated "Energy Conserving." The front of that bottle has the star burst symbol. The 15w50 does not.
See attached picture. Look at the circle on the back of each bottle. Note only the 5w30 bottle, on the left, is stated "Energy Conserving." The front of that bottle has the star burst symbol. The 15w50 does not.
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