The performance of motor oils in engines run on unleaded fuels was evaluated using several makes of United States cars. These oils, SAE 10W-40 grades, were run in high mileage or turnpike service, as well as surburban service. The performance with unleaded fuels was not significantly different from that for leaded fuels in the areas of wear, sludge, varnish, or rust.Valve seat recession was detected in several of the cars, but had an effect on performance in only one case.Further testing using laboratory engines and a patrol fleet in pursuit service demonstrated the effect of lubricant composition on valve seat recession. In addition, it was found that engines preconditioned on leaded fuels afforded better protection against valve seat recession than new engines.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of Unleaded Fuel on Lubricant Performance


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Mid-Year Meeting ; 1971



    Publication date :

    1971-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Unleaded Gasoline - Lubricant Requirements and Fuel Additive Performance

    Orrin, D. S. / Kipp, K. L. / Miner, W. R. | SAE Technical Papers | 1972


    Unleaded fuel only

    Automotive engineering | 1984


    Unleaded AVGAS Program

    D. Atwood / A. Ferrara / P. Ringebach | NTIS | 1994


    Stepping toward unleaded

    Online Contents | 2014


    The effect of unleaded gasoline formulation on antiknock performance

    Millo,F. / Ferraro,C.V. / Rocco,M. et al. | Automotive engineering | 1994