I agree that bio is great, and I would still be using it had the station that I was buying it from gone broke due to a trucking company with a bogus credit card.

But keep an eye on your hoses. They will eventually get soft and gummy, and leak. Spray the left side of the engine with degreaser and wash it off so you can see if anything is leaking. McMasters sells Viton tubing, which won't leak.
It's pricey, perhaps pricier than replacing standard hoses every year or two. I can vouch for their return lines.

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)