The oil filter housing on Prius can be overtightened by shops and may be unable to remove with a standard filter wrench with a hex cap shape alone. I tried to remove it on my Prius with a standard wrench. The result was that the little round plate with the 3/8 ratchet fitting in the center that is spot welded to the filter wrench just broke right off of the wrench at the spot welds.
After looking around on the web, I found a filter wrench that grabs not only the hex top, but the entire cap including the six tabs that stand up from the base of the filter cap. This filter wrench has six slots at the edge that fit down over these tabs that make it impossible for the wrench to slip. It is well constructed; it is made from a solid cast pour not rolled thin sheet metal. It has 64.5 mm width and probably works on several model years.
The filter wrench is manufactured by Private Brand Tools or PBT, part number 71110 of Australia. It can be found on Amazon or EBay. I bought it from Amazon.com for $27 including shipping. It was well worth the money. The filter came off the first time I turned the wrench. Nothing else would get it off and I didn't have to wrap the filter housing in cloth to ensure a tight fit either.
After looking around on the web, I found a filter wrench that grabs not only the hex top, but the entire cap including the six tabs that stand up from the base of the filter cap. This filter wrench has six slots at the edge that fit down over these tabs that make it impossible for the wrench to slip. It is well constructed; it is made from a solid cast pour not rolled thin sheet metal. It has 64.5 mm width and probably works on several model years.
The filter wrench is manufactured by Private Brand Tools or PBT, part number 71110 of Australia. It can be found on Amazon or EBay. I bought it from Amazon.com for $27 including shipping. It was well worth the money. The filter came off the first time I turned the wrench. Nothing else would get it off and I didn't have to wrap the filter housing in cloth to ensure a tight fit either.