The 2-letter designations in your owners manual and on the oil bottle are API service standard designations. The most recent one is SM; SL and SJ are also current. All the other ones (those listed in your manual) are now obsolete, having been superseded by the current ones. What this means is that an oil with an SM/SL rating EXCEEDS the standards which the obsolete designations referred to, so is a better oil than what your owners manual specified. Which means there is no problem with using it in your VX.Originally Posted by Techy-D
So I got some Mobil1 10w-30 (SuperSyn Technology Fully Synthetic) and plan to change the oil this weekend. I looked in my user manual and it says USE ONLY API, SE, SF, SG, SH, or ILSAC GF-1 Quality Oil
Additional designations of quality may also be present, but SE, SF, SG, SH or GF-1 must be included.
So I look at my new bottles of Oil and they don't seem to match any of those??? The bottle has ILSAC GF-4 API SM, SL/CF
Am I good to go, or did I find the wrong stuff?
Enquiring minds want to know!
The GF-4 is the current ILSAC standard, much higher than the GF-1 that the owners manual specifies.
The CF refers to rating for diesel engine use so does not concern us.
If you want to know more about oil, the best site I have found is www.bobistheoilguy.com.
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