<VV> SL oil again

[FrankCB]

Dennis,
On a recent trip to WalMart, I got some Mobil 1 synthetic oil for "High Mileage" vehicles (that's supposed to be for those with 75,000 miles or more).  When I saw the label indicated it was SL oil, I bought it.  I hope the higher levels of zinc and phosphorus don't adversely affect my 1995 TransSport's catalytic converter which has about 140,000 miles.on it.  Of course my Corvair doesn't have that concern!!!
     Frank Burkhard

In a message dated 09/17/08 09:43:28 Eastern Daylight Time, dfamily at fairpoint.net writes:
A few weeks ago I wrote that I found some Quaker State 10W-40 in the local Autozone that was marked API SL.  I bought all they had on the shelve.  I went back yesterday and they had restocked with the same SL oil.  They had lots of it.  I just assumed it was old stock but now I am not sure.   Could this be new oil that is being targeted for older cars?  They only had 10W-40.   
    Even more interesting (to me) is that I went to the local John Deere dealer to get some oil & filters for my garden tractor.  I picked out some 10W-30 and noticed it was also marked SL.  This was specifically John Deere Turf-Gard 4 cycle motor oil, SAE 10W-30, API Service SL.  So my liquid cooled tractor can share the same oil as my air-cooled corvairs. 
     The SL oil is out there - but you have to hunt for it!.       Dennis Dorogi