1979-1993 & 94 Conv [Subscribe to Daily Digest] |
I like synthetic on turbos, 10-12K annual with six month oil filter change and add oil is sufficient.
I use amsoil 15W-40 marine/diesel synthetic with the small SDF57 oil filter (amsoil has a new nano filter if you wish) and a bypass oil filter. I change the bypass every two or three oil filter changes.
The only thing I notice with spectrometric oil analysis is carbon particulate buildup at around 12K....goes to zero with oil change or bypass filter change.
I changed my 87 900T to synthetic in 1992 when I bought it with 133k on it...kept synthetic in it when I had the engine rebuilt at 192K miles.
I had the timing chain and tensioners changed at the 192k mile rebuild...it DOES make a noise difference even if not a functional difference. On your 91K car don't worry about it until it gets noisy and even then you probably won't notice the noise.
The AC tensioner pulley is a known weak point...they dry out or wear and get noisy, giving you warning. Easiest is to release the tension and take the belt off the pulley and spin the pulley...noisy gets a shot or oil or needle injection wheel bearing grease (synthetic!) or replace with grotonfcp pulley (better bearing) for about $8 plus shipping.
Change out the brake fluid AND clutch fluid. do it every two years. or else. corrosion/problems.
Rear brakes have the ebrake and it gets expensive to change out that caliper so change the fluid!
Watch the heater valve for leaks...another known failure. 91K isn't a lot, but you're getting old in the tooth and the voltage regulator can have problems...replace it now or at 140K for sure (brush wear starts to show around then). FWIW, I have 280K on mine and this just reminds me to change out the brushes...they can be replaced with an $8-12 bosch brush kit requires some soldering.
LOOK at the front lower A-arms...known weakness for cracks in the arm near the bushing.
posted by 68.55.24...
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