Dipstick heaters tend to burn the oil around them, while pad heaters spread that heat over a much greater area (plus transfering the heat through the metal pan further diffuses the it).
Dipstick Oil Heater
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread