0W 20 oil in my 6.8 L V. 10
I went to change the oil in my Fourwinds E350 6.8 L V. 10 the other day and after I drained the oil I realized I only had mostly 0W 20 full synthetic along with some 5W 20 full synthetic to put back i...
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Yeah, but now Ford, since 2001 I believe, recommends 5W 20.
You are correct. Ford had been having an massive top end failure rate on the modular engines (4.6 5.4 and 6.8) and found it was oil starvation on cold start. This was found to be the fault of heavier 5W/30 oil that was spec'ed. There was two TSB's published on this in 2002 to use 5W/20.
Yeates689 here is what Ford spec's for 2013 6.8
Ford Part Name
Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil (US)
Motorcraft SAE 5W-20 Full Synthetic Motor Oil (US)
Motorcraft SAE 5W-20 Super Premium Motor Oil (Canada)
Motorcraft SAE 5W-20 Synthetic Motor Oil (Canada)*
Ford Part Number
XO-5W20-QSP (US)
XO-5W20-QFS (US)
CXO-5W20-LSP12 (Canada)
CXO-5W20-LFS12 (Canada)
Ford Specification
WSS-M2C945-A
*Note: Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the requirements of Ford specification WSS-M2C945-A and display the API Certification mark.
I use Mobile 1 5W/20 and Motorcraft filter. If you do your research you will find that the Motorcraft filter's have one of the best synthetic media elements in the filter market, and the flow rate is correct for the engine.
You are correct. Ford had been having an massive top end failure rate on the modular engines (4.6 5.4 and 6.8) and found it was oil starvation on cold start. This was found to be the fault of heavier 5W/30 oil that was spec'ed. There was two TSB's published on this in 2002 to use 5W/20.
Yeates689 here is what Ford spec's for 2013 6.8
Ford Part Name
Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil (US)
Motorcraft SAE 5W-20 Full Synthetic Motor Oil (US)
Motorcraft SAE 5W-20 Super Premium Motor Oil (Canada)
Motorcraft SAE 5W-20 Synthetic Motor Oil (Canada)*
Ford Part Number
XO-5W20-QSP (US)
XO-5W20-QFS (US)
CXO-5W20-LSP12 (Canada)
CXO-5W20-LFS12 (Canada)
Ford Specification
WSS-M2C945-A
*Note: Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the requirements of Ford specification WSS-M2C945-A and display the API Certification mark.
I use Mobile 1 5W/20 and Motorcraft filter. If you do your research you will find that the Motorcraft filter's have one of the best synthetic media elements in the filter market, and the flow rate is correct for the engine.
