In our study of changes in magnetic properties during low temperature oxidation of oceanic pillows, we were able to essentailly eliminate variations in grain size which plagues many previous studies. This was accomplished by keeping the cores parallel to the outer glassy margin of the pillows while drilling the variably oxidized portions of the basalt. Curie temperature (Tc) measurements indicated a large range in the degree of low temperature oxidation, although most were in the early stages of maghemitization (Tc<300¿C). In samples with hysteresis parameters showing pseudo-single domain behavior, the natural remanent magnetization (Jnrm) and susceptibility both decreased substantially with low temperature oxidation. Thus, the Koenigsberger ratio (Jnrm/Jinduced) did not change. The reduction in Jnrm was mirrored by comparable decreases in saturation magnetization and saturation remanence. Low temperature oxidation also increased the bulk coercivitiy and the coercivity of remanence in the oxidized basalt relative to the less oxidized. These later results are consistent with the theory that low temperature oxidation generally stabilizes the remanent magnetization of seafloor pillow basalts. The increase in coercivity with oxidation in these pillow basalts contrasts will synthetic samples which show an overall decrease. The behavior of natural samples reflects processes which occur during low temperature oxidation that do not normally occur in synthetic samples, specifically the loss of iron from the grain and perhaps grain cracking.