Quote:
Originally Posted by Hicaira
According to Mobil's website, the EP is API certified:
" Does the Mobil 1 Extended Performance meet GF-4 specifications? How did the new specification impact the development of the high-endurance product line? Mobil 1 Extended Performance contains an extra performance additive to help deliver exceptional performance and protection. This fully synthetic technology is designed specifically for longer service intervals. Appropriate viscosities of Mobil 1 Extended Performance also meet all the requirements for GF-4. Additionally, they exceed the requirements of API SL/CF and various ACEA (European) specifications. (Updated March 2006)
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Based on that, it sounds like 20K intervals would be ok. How many less M1 oil changes equals a suspension kit

?