Oil Consumption

[Hayes Myers]

Have noticed use of 1 litre  of oil in 7 days (~450km driving).  Only change
was the dipstick (new one put in) and a new thermostat. T-stat works fine,
dipstick seals amazing. Not seeing any oil leaks / spots etc.   From reading
it could be potentially the oil filter or oil weight?  Ie: 5/30 might not be
great oil.  

 

Oil pressure reads ~5 at startup and drops to 2.4 on hwy, 1.8 in town.
Mechanic noticed rear main seal minor leak at safety.  Any noise associated
with this leak has since disappeared.  Perhaps total failure of the seal?
Really seems like a lot of oil loss. and had not noticed this until quite
recently.

 

I'm going to hit jack her up tomorrow and take a better look from
underneath.

 

Thanks in advance !
Hayes

 

91 200 TQM 10v