2008 Toyota Tundra 4WD SR5 5.7L (175K)
Out:Mobil One Truck & SUV 5W30 and Purolator Boss PBL25702 (3983 mile OCI)
In: 5 quarts Pennzoil Platinum High Mileage 5W30 SQ and 3 quarts of Pennzoil Ultra Platinum 5W20 SP and ST10295
LubeGard Red has been my go to over the last 2 decades. I always use a full bottle for the 1st spill and fill. Then add an ounce per quart there after on fills and spills. Helped my 08 Acura TL with a shudder when I bought it with 64K miles. Use it in all my older rides and friends vehicles...