Originally Posted By: mechtech2
Originally Posted By: Pablo
Because the Amsoil look up guide just parrots back Volvo's recommendation. With 16 years of experience with this engine, I simply know a bit better as to what oils keep it clean and welling running. And I can say without any doubt that standard API oils will not do the job much beyond 4-5K. I for one simply will not waste my time changing the oil so frequently. I change the oil every 12-14 months, and have done 10-20K mile runs. My engine is spotless.
Some lighter 0W/5W-40's do fine in this engine as well, but some are too extreme on the other end. The relatively higher HTHS 40's will bog this engine which really doesn't come alive until, what 3000 rpm+ or so.
Well, this should answer both the oil and engine queries!
A home run!
+1 you can see what I run.
Here's what the TNN for cleaning sludged engines states, "Clean the oil filter casing and install the new oil filter.
Fill with new Synthetic Oil; this will assist in continuing the cleaning process. ACEA A1/B1, viscosity SAE 5W-30
Note: Engines subjected to extreme driving conditions are to be filled with ACEA A1/B3, viscosity SAE 5W-30 Synthetic oil.
"Extreme" regards driving conditions that generate abnormally high oil temperature or oil consumption, such as driving in mountains with a lot of engine braking or when driving at high
speeds on highways.
ACEA A3/B3, viscosity SAE 5W-30 Synthetic oil.
Customer information
Affix the oil decal (part no.30748024) on the upper radiator member. Remove any existing decal.
Caution! Make sure that the customer is aware of the importance of following the prescribed oil change intervals and the benefits of using Synthetic oil to prevent engine oil deposits from reoccurring. Use the Synthetic oil grades specified in step 13.
Follow up oil and filter change
Drive 2,000 km/1,200 miles and then replace the oil and filter. Use one of the Synthetic oil grades specified at step 13"
http://www.volvoxc.com/resources/how-to/pdf/01-23-09/TNN,%20Lubrication%20System%20Contamination%20Cleaning.pdf
Cheers,
Astro