• danwat1234 Posted: 3/7/2011 12:20pm PST

    So, will using "sn, GF-5" oils in an older car make the engine last longer? Less wear when oil pressure is low? Less wear when cold starting an engine?
    I may just stick with my Chevron Supreme SM 10w30 in my 1999 Civic, but perhaps SN would be worth it?
    Thanks for the input.

  • Bubba Johnny Posted: 10/21/2010 11:47am PDT

    Valvoline Synpower (Ashland) datasheet shows the current 5w-30 grade SM/GF-4 meeting GM 4718M and ACEA A5. Given current crop of "fully synthetic" labeled oils contain little (if any) traditional synthetic (higher group) basestocks, The ILSC GF-5 or DEXOS1 would be good choices for 95% of the motoring public currently using a more pricey synthetic.

  • Rich Posted: 10/21/2010 10:46am PDT

    So can you use the new oils in older cars?

  • Kevin S. McCartney Posted: 10/21/2010 10:41am PDT

    Nice effort but very misleading and potentially harmful. No major manufacturer selling passenger cars in North America accepted API-SM approval as sufficient for their cars. likewise, the new API-SN is not sufficient. ILSAC GF-4 includes API SM as a requiremeny and ILSAC GF-5 includes API SN as a requirement. all ILSAC GF-5 approved products also meet API-SN requirements but many API SN approved products fail to meet ILSAC GF-5 requirements.
    GM dexos1 is a considerably more stringent standard than ILSAC GF-5. Castrol and Valvoline both lacked the technology and/or motivation to meet the older GM 4718M, ACEA A5/B5 and Honda HTO-06 requirements in their best oil products. They now likewise lack the motivation and/or technology to meet requirements for the new GM dexos1 approval and licensing.

  • J-F Houle Posted: 10/20/2010 3:37pm PDT

    I use syntetic oil in my saturn sl 2002 for 3 years. The engine stars very well during cold morning in the winter. Do i have made a good choice ?