When I test run all of my chainsaw I use 40 to 1 with Amsoil oil full synthetic 2-stroke mix. This chainsaw has a high-volume oil pump which is a stihl OEM shaft in the aftermarket pump. You may or may not notice in the photos I use a OEM Stihl skid plate on the bottom of the fuel tank as well as a OEM Stihl space bracket on a handle bar.
This chainsaw also has a 8 tooth Rim sprocket as pictured in the photos as well as the large West Coast sprocket cover. This sale is for power head only users beware Not an amateurs chainsaw for this one has much more power. The item "MS 660 BIG BORE CHAINSAW" is in sale since Tuesday, January 1, 2019.
This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Chainsaw Parts & Accs". The seller is "jklawns2012" and is located in Fort Pierce, Florida. This item can be shipped to United States, Bahamas, Uruguay, Barbados, Bermuda, Brunei darussalam, Bolivia, Guadeloupe, Iceland, Jordan, Cambodia, Cayman islands, Liechtenstein, Luxembourg, Monaco, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.