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{{Short description|Certification for two-stroke oils}}
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'''API TC''' is a [[product certification|certification]] for [[Two-stroke cycle|two-stroke]] [[Motor oil|oils]], awarded by the [[American Petroleum Institute]]. It is given after the product passes through stringent tests that determine the level of [[detergent]] performance, [[Dispersion (chemistry)|dispersion]], and [[Antioxidant|anti-oxidation]]. It is the only remaining, not revoked classification of the API Two-Cycle motor oil specifications (TA, TB, TC, TD). Being a very old standard itself, most currently produced 2T lubricants meet its specifications, even the lowest quality ones; current high-quality oils exceed them (often labeled "API TC+" although not based on actual measurements).
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A higher grade, TD, was considered similar to the [[National Marine Manufacturers association]] (NMMA) "TC-W" (water-cooled outboard engine) grade. The NMMA has now replaced this specification with the higher TC-W3 standard.<ref>http://www.oilspecifications.org/api_2t.php</ref>
==References==
{{Reflist}}
{{Authority control}}
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