I suspected it was Hilda Knutsen you were after. Like I said I came across 3 of them in my books on Haugesund ships, but only one, a fairly new one, is spelt Knutsen with a t, the other 2 are spelt Knudsen.
Hilda Knutsen - Delivered in Dec.-1989 from S.A. Juliana Constr. Gijonesa, Gijon as Hilda Knutsen to Knutsen Produkt Tanker K/S, Haugesund. 11 425 gt, 5 286 nrt, 14 910 tdw, 141.50X23.00 m. 4-syl. 2T EV AESA MAN-B&W, 7120 BHK, 13.5 knots. Delivered on a 10 years T/C for Statoil - remeasured in March 1992, 11 424 gt.
Hilda Knudsen - built 1928 is discussed on my H-list
except for these details:
5472 nrt, 13 120 tdw, 470.3X64.5X35.6 ft, 2 X 6-syl 4T EV B&W, 3400 BHK, 11 knots.
Remeasured: 14 100 tdw.
The Other Hilda Knudsen was an oil tanker built in 1976, delivered in Apr. that year from Kawasaki Heavy Industries Ltd., Sakaide, as Hilda Knudsen to P/R Hilda Knudsen, Haugesund. Transferred in Dec.-1982 to K/S Knutsen tankers A/S (Knutsen OAS Shipping A/S). Sold and renamed several times between 1984 and 1991, the last time was to Monrovia in July 1991 when she was renamed Mira Star. There's more details on this ship (Våre motorskip, Leif M. Bjørkelund/E. H. Kongshavn), but since I don't know which one you're after, I'm not copying it all down here.