A 1996 Toyota Tacoma 4-cylinder is able to use 5w20 weight oil. When the oil is changed, the oil filter should be changed as well.
It is important to use the right oil in any car to help it give a smooth ride. For a 1999 Toyota Tacoma, the right engine oil would be SAE 5w30 .
Use Castrol 5W-30
I would use 5w 50 older truck
What does your owner's manual say? I would suspect it say's 5w20.
The 2003 Toyota Tacoma runs on regular unleaded.
The 2002 Toyota Tacoma runs on regular unleaded.
The 2008 Toyota Tacoma runs on regular unleaded.
The 2005 Toyota Tacoma runs on regular unleaded.
The 2011 Toyota Tacoma runs on regular unleaded.
The 2007 Toyota Tacoma runs on regular unleaded.
The 2010 Toyota Tacoma runs on regular unleaded.